Captcha-sourcecenter.com: what it is and how to remove it
Captcha-sourcecenter.com is a dubious website developed for only one reason - show deceptive ads and redirect to affiliated pages. It does that by prompting visitors to subscribe to its notifications.
Facts checked October 6, 2026. Removal steps tested on Windows 11 (26H2) and checked against Microsoft's and the browser makers' current documentation. Sections marked as our earlier report are the original text: they describe the threat as it was then and have not been reviewed since. The 2026 status, the removal steps and the questions are current.
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Captcha-sourcecenter.com: summary
| Distribution | Fake Flash Player updates, freeware, deceptive ads |
|---|---|
| Damage | Financial losses, other PUP installation, privacy issues, malware infections |
| name | Captcha-sourcecenter.com |
| Type | PUP, adware, redirect virus |
| Purpose | Deceive visitors into enabling notifications to show ads and cause redirects to affiliated sites |
| Ip address | 5.8.34.165 |
| Removal | Scan the PC with security software to find and remove the malware and anything installed with it. Fortect scans Windows for malware and repairs the system files and settings it damaged. Remove it nowTo use the full-featured product, you have to purchase a license for Fortect. The scan is free. |
Show 8 more facts
| Symptoms | Ads popping up as notifications, redirects to questionable sites, slower device performance |
|---|---|
| Detection names | No Microsoft detection name is known |
| Name | Captcha-sourcecenter.com |
| Evidence | 4 write-ups by security sites; details still limited |
| Imitates | A human-verification check |
| Domains | captcha-sourcecenter[.]com |
| First seen | 22 March 2021 |
| Facts checked | 6 October 2026 |
Is the Captcha-sourcecenter.com check real?
- Address:
captcha-sourcecenter[.]com
From our report of Mar 2021 · not reviewed since
More from our earlier report on Captcha-sourcecenter.com
- All infections, no matter how insignificant or severe, should be eliminated by using a trustworthy anti-malware tool
- PUPs and shady websites you're forced to visit leave many traces on your system directories and files.
What the Captcha-sourcecenter.com scammers want
From our report of Mar 2021 · not reviewed since
Be observant when installing software from a bundle
People usually are puzzled about how did potentially unwanted programs get on their devices.
Although there are many ways such junkware can be spread, one of the most popular PUP delivery techniques is through software bundles, i.e., packs containing installers for more than one app.
These bundles are usually downloaded from third-party software vendors, but lately, more and more app developers decide to earn a penny by adding additional apps to their downloads. Thus people should be aware of this, and they should stay alert when installing any new software.
The easiest way to avoid PUPs is to choose the Advanced or Custom installation mode instead of the Recommended, Quick, Standard ones. Then go step-by-step and remove preselected ticks from all software that seems at least a bit suspicious, or you don't need it in the first place.
If you're on the fence about any app, you can always do a web search or check if we haven't written about it.
Why Captcha-sourcecenter.com opens in your browser
From our report of Mar 2021 · not reviewed since
Captcha-sourcecenter.com is a dubious website developed for only one reason - show deceptive ads and redirect to affiliated pages.
It does that by prompting visitors to subscribe to its notifications. This rogue site can do that by showing different messages, which depend on your geolocation.
You might see a prompt that urges you to press the Allow button to verify that you're not a robot, that you're over 18 years old, to close the window, to continue watching a video, and so on. Push notifications should only be accepted from legitimate sources, so please don't enable Captcha-sourcecenter.com notifications.
If you didn't type in the culprit's address manually into the URL bar, but the website is still opened, you have an adware infection on your device. The good news is that it can be easily eliminated with our guides posted at the bottom of this article.
Captcha-sourcecenter.com virus will display ads in the form of notifications as soon as you push the Allow button. They will be shown directly on your phone screen or the computer desktop. In some cases, the "X" button can't even be pushed, as either the ad won't close or an affiliated page opened as if you've clicked on the ad itself.
Captcha-sourcecenter.com ads are deceptive as they don't represent the sites you will be redirected to. The ads and the affiliated websites usually have nothing in common. The ads are made to be alluring, sometimes even irresistible, but they should never be clicked on.
But websites like Captcha-sourcecenter.com, including News-central.org, Therequire.biz, Eriodordedl.biz, and a myriad of others, have a way of forcing you to visit affiliated sites either way. They can cause sudden redirects, where new tabs with sponsored websites are opened out of the blue.
The worse thing is that the portals that Captcha-sourcecenter.com advertises might have various malicious intentions. Some might try to draw you into gambling, while others steal your private information (credit card details, SSNs, phone numbers, etc.) or download malware automatically through drive-by downloads.
Thus although adware is categorized as a potentially unwanted program, it can become a gateway to more severe malware infections, such as Trojans, ransomware, and alike. Therefore, you should remove Captcha-sourcecenter.com and any adware or other suspicious files immediately.
The best and easiest way to do that is by entrusting this task to reliable anti-malware software. Download free security tools such as or , perform a full system scan, and let either of these AV tools do the rest.
What to do if you ran the Captcha-sourcecenter.com command
Whether you ran the command decides everything else, so the first step checks that.
Step 1: Check whether the pasted command ran
The fake check asked you to press Windows + R, paste and press Enter. Open the same box and look at its drop-down history: a
powershell,mshtaor curl line you did not type yourself is the command Captcha-sourcecenter.com gave.Once run, it fetches malware within seconds, so take the PC offline and follow all the remaining steps. If the history is empty or harmless, nothing was started on the Windows 11 or Windows 10 PC.
Full procedure with screenshots: Run a Microsoft Defender Offline scan
Step 2: Scan the PC, then run the offline scan
A scan finds the parts of Captcha-sourcecenter.com that the manual steps cannot see. In Windows Security > Virus & threat protection > Scan options, start a Full scan and quarantine what it reports.
Follow it with Microsoft Defender Antivirus (offline scan) > Scan now, which restarts the PC and checks the disk while Windows and the malware are not running.
It takes about 15 minutes and works the same in Windows 11 and Windows 10. If either scan finds something, run the full scan again after removal until it comes back clean.
Windows 11: Windows Security > Virus & threat protection > Scan options. Full procedure with screenshots: Run a Microsoft Defender Offline scan
Step 3: Change passwords from another device and sign out other sessions
Captcha-sourcecenter.com can copy saved passwords, cookies and session tokens and send them out in seconds, so cleaning the PC does not undo the theft.
Change your passwords on a device that was never infected, starting with the e-mail account, since every other reset goes through it. On each account, end all other sessions and check the recovery e-mail, phone number and forwarding rules.
Then turn on two-step verification. Sign in on the Windows 11 or Windows 10 PC again only after the offline scan is clean.
Full procedure with screenshots: Turn on two-step verification / secure a hacked account
Step 4: Delete scheduled tasks that bring it back
Programs like Captcha-sourcecenter.com add a scheduled task so they return after an uninstall or reopen a page at every sign-in. Start Task Scheduler, open Task Scheduler Library and sort by Last Run Time to see what ran recently.
On the Actions tab, a program in a user folder, a script or a web address is a warning sign; right-click such a task and choose Delete.
Tasks with names copying Google, Edge or Windows updaters but pointing to an odd folder are typical. The tool looks the same in Windows 11 and Windows 10.
Windows 11: Task Scheduler Library, the task selected, the Actions tab shows the file it runs. Full procedure with screenshots: Remove what malware leaves behind in Windows
Instructions for each browser and system
The detailed steps for every browser and system this guide covers. Open the one you use.
Uninstall from Windows
Uninstall from Windows 10/8:
- Type Control Panel into the Windows search box and open the result.
- Under Programs, select Uninstall a program.
Uninstall from Windows 7/XP:
- Click on Windows Start > Control Panel (Windows XP users should click on Add/Remove Programs).
- In Control Panel, select Programs > Uninstall a program.
Remove the unwanted program:
- In the Programs and Features window, look for any recently installed suspicious entries, select them, and click Uninstall.
- If User Account Control appears, click Yes to confirm, then complete the removal.
Remove from Google Chrome
Delete malicious extensions from Google Chrome:
- Open Google Chrome, click on the Menu (three vertical dots at the top-right corner) and select More tools > Extensions.
- In the newly opened window, you will see all the installed extensions. Uninstall all suspicious extensions related to the unwanted program by clicking Remove.
Clear cache and web data from Chrome:
- Click on Menu and pick Settings.
- Under Privacy and security, select Clear browsing data.
- Select Browsing history, Cookies and other site data, as well as Cached images and files.
- Click Clear data.
Change your homepage:
- Click menu and choose Settings.
- Look for a suspicious site in the On startup section.
- Click on Open a specific or set of pages and click on three dots to find the Remove option.
Reset Google Chrome:
If the previous methods did not help you, reset Google Chrome to eliminate all the unwanted components:
- Click on Menu and select Settings.
- In the Settings, scroll down and click Advanced.
- Scroll down and locate Reset and clean up section.
- Now click Restore settings to their original defaults.
- Confirm with Reset settings.
Remove from Microsoft Edge
Delete unwanted extensions from MS Edge:
- Select Menu (three horizontal dots at the top-right of the browser window) and pick Extensions.
- From the list, pick the extension and click on the Gear icon.
- Click Remove.
Clear cookies and other browser data:
- Click on the Menu (three horizontal dots at the top-right of the browser window) and select Settings > Privacy, search, and services..
- Under Clear browsing data, pick Choose what to clear.
- Select Cookies and other site data and Cached images and files. (apart from passwords, although you might want to include Media licenses as well, if applicable) and click on Clear.
Restore new tab and homepage settings:
- Click the menu icon and choose Settings.
- Then find On startup section.
- Click Remove next to any suspicious startup page.
Reset MS Edge if the above steps did not work:
- Press on Ctrl + Shift + Esc to open Task Manager.
- Click on More details arrow at the bottom of the window.
- Select Details tab.
- Now scroll down and locate every entry with Microsoft Edge name in it. Right-click on each of them and select End Task to stop MS Edge from running.
Delete extensions from MS Edge (Chromium):
- Open Edge and click select Settings > Extensions.
- Delete unwanted extensions by clicking Remove.
Clear cache and site data:
- Click on Menu and go to Settings.
- Select Privacy, search and services.
- Under Clear browsing data, pick Choose what to clear.
- Under Time range, pick All time.
- Select Clear now.
Reset Chromium-based MS Edge:
- Click on Menu and select Settings.
- On the left side, pick Reset settings.
- Select Restore settings to their default values.
- Confirm with Reset.
- This will disable extensions and reset startup pages but will not delete bookmarks, saved passwords, or browsing history.
Remove from Mozilla Firefox (FF)
Remove dangerous extensions:
- Open Mozilla Firefox browser and click on the Menu (three horizontal lines at the top-right of the window).
- Select Add-ons.
- In here, select the unwanted extension and click Remove.
Reset the homepage:
- Click three horizontal lines at the top right corner to open the menu.
- Choose Settings.
- Under Home, set your preferred homepage and new tab settings.
Clear cookies and site data:
- Click Menu and pick Settings.
- Go to Privacy & Security section.
- Scroll down to locate Cookies and Site Data.
- Click on Clear Data...
- Select Cookies and Site Data and Temporary cached files and pages, then click Clear.
Reset Mozilla Firefox
If clearing the browser as explained above did not help, reset Mozilla Firefox:
- Open Mozilla Firefox browser and click the Menu.
- Go to Help and then choose Troubleshooting Information.
- Under Give Firefox a tune up section, click on Refresh Firefox...
- Once the pop-up shows up, confirm the action by pressing on Refresh Firefox.
Delete from Safari
Remove dangerous extensions:
- Open Safari, click Safari in the menu at the top-left of the screen, and select Preferences.
- Go to the Extensions tab, look for any suspicious entries, and click Uninstall to remove them.
Clear history and website data:
- Click Safari in the menu and pick Clear History.
- Set Clear to all history and confirm with Clear History.
Reset Safari:
- Click Safari in the menu and select Preferences > Advanced.
- Enable Show Develop menu in menu bar.
- From the menu bar, click Develop and select Empty Caches.
Delete from macOS
Remove the unwanted application:
- From the menu bar, select Go > Applications.
- In the Applications folder, look for any suspicious entries, then drag them to Trash (or right-click and pick Move to Trash).
Delete leftover files and folders:
- Select Go > Go to Folder.
- Enter /Library/Application Support and remove any suspicious folders related to the unwanted program.
- Repeat the same check in the /Library/LaunchAgents and /Library/LaunchDaemons folders, deleting any suspicious entries.
- Finally, empty the Trash to permanently remove the leftovers.
Uninstall from Android
Uninstall unwanted programs from Android device:
- Go to Settings -> Apps/Applications.
- Expand the full list of the installed apps.
- Scroll through the list and tap on a suspicious application once.
- Tap on it and select Uninstall.
- If the Uninstall option is unavailable, the app may require additional permissions to be revoked first.
- Reboot the device.
Clear storage and cache for Google Chrome or other apps::
- Go to Settings > Apps/Applications.
- Expand the full list of the installed apps.
- Tap on Chrome and select Storage & cache.
- Clear storage and clear cache of the app.
If you are seeing ads on top of other apps but are not sure what is causing it, perform the following steps:
- Go to Apps/Applications.
- Select Special App access.
- Tap on Display over other apps.
- Eliminate apps with these access rights enabled.
Stop browser notifications
Stream videos without limitations, no matter where you are
There are multiple parties that could find out almost anything about you by checking your online activity.
While this is highly unlikely, advertisers and tech companies are constantly tracking you online. The first step to privacy should be a secure browser that focuses on tracker reduction to a minimum.
Even if you employ a secure browser, you will not be able to access websites that are restricted due to local government laws or other reasons. In other words, you may not be able to stream Disney+ or US-based Netflix in some countries. To bypass these restrictions, you can employ a powerful VPN, which provides dedicated servers for torrenting and streaming, not slowing you down in the process.
Data backups are important - recover your lost files
Ransomware is one of the biggest threats to personal data.
Once it is executed on a machine, it launches a sophisticated encryption algorithm that locks all your files, although it does not destroy them. The most common misconception is that anti-malware software can return files to their previous states. This is not true, however, and data remains locked after the malicious payload is deleted.
While regular data backups are the only secure method to recover your files after a ransomware attack, tools such as can also be effective and restore at least some of your lost data.
From our report of Mar 2021 · not reviewed since
Instructions to remove Captcha-sourcecenter.com virus quickly but safely
Push notifications are a legitimate service used by many websites to bring you the latest news, sports updates, sales, etc. But threat actors tend to misuse it by creating Captcha-sourcecenter.com virus and shady websites alike to deliver deceptive ads right to people's doorsteps.
In the future, please remember to accept notifications only from legitimate pages that you frequently visit. For now, remove Captcha-sourcecenter.com by scanning your device with a reliable anti-malware tool. Proper security software would block such pages and prevent such perils in the future.
If you've clicked the Allow button, use our Captcha-sourcecenter.com removal guides for browsers (Safari, Chrome, etc.) posted below, and you'll be done within minutes. IT experts urge you to perform system diagnostics to keep your system files at bay and tracking cookies away.
Questions about Captcha-sourcecenter.com
What did the captcha-sourcecenter[.]com verification command do?
In ClickFix campaigns the pasted line starts a hidden PowerShell, mshta or curl process that fetches a script from a remote server and runs it. That script installs the real payload, most often an information stealer, sometimes a remote access tool or a loader that brings more malware later.
The exact payload of captcha-sourcecenter[.]com can change from day to day, which is why the safe response does not depend on knowing it: scan offline, remove what was added and change passwords from another device. Look in the Run box history with Win+R to confirm the command was executed.
Could Windows Security have stopped the captcha-sourcecenter[.]com command?
Sometimes. Microsoft Defender blocks many known ClickFix scripts and payloads, and Protection history in Windows Security will show it if it did. But campaigns change quickly, and a command you ran yourself starts with your permissions, so a new variant can get through before signatures catch up.
Check Protection history for entries from the time you visited captcha-sourcecenter[.]com. Whatever it shows, run an offline scan, look for new startup items and change your important passwords from another device, because stealers act fast and what they took cannot be called back by a later detection.
Does a human-verification check know about Captcha-sourcecenter.com?
Large brands such as a human-verification check are aware that scammers copy their names and logos, and most have pages where you can report such abuse. They do not run these pages and do not profit from the warnings themselves.
Sometimes an affiliate of an antivirus vendor sends traffic through fake alerts, which breaks the vendor's rules and gets the affiliate banned when reported. If you want to help, report the page address to the brand's security team and to your browser through its report option.
Why does my browser keep opening captcha-sourcecenter[.]com?
Because something sends you there. The usual causes are a notification permission you gave to some site, an adware extension, or a site you visit often that shows redirect ads. The site itself cannot open on its own.
Remove unknown sites from the notification settings, check the extensions list, and do not restore the previous session when the browser starts. If the page appears even with the browser closed, look in Installed apps for programs you did not install. Running a scan with Windows Security afterwards confirms that nothing else is involved.
Why does Captcha-sourcecenter.com use the a human-verification check design?
Because people see real a human-verification check checks every day and click through them without thinking. The attackers copy the familiar box, the colours and the wording, then add a few extra steps that look like part of the routine.
The trust in the real service is what makes the trick work. That is also why the page appears on ordinary websites: a hacked site with a familiar check feels safe. The extra keyboard steps are the only reliable sign, and they are always fake.
The page will not close. What can I do?
Press Esc to leave full-screen mode, then close the tab. If the browser is frozen, open Task Manager with Ctrl + Shift + Esc, select the browser and click End task. When you restart the browser, do not restore tabs.
If the page loads again on start, open a new window and close the old one, then remove the page from the browser's startup settings. Restarting the PC also works. Nothing was installed by the page, so closing it by force is safe and loses nothing.
Why is pasting a command so dangerous?
Because it skips every protection that would stop a normal download. Browsers check files you download and SmartScreen checks programs you open, but a command you type yourself is trusted as your own action. Pages like Captcha-sourcecenter.com exploit exactly this.
The command fetches and runs code in memory, often leaving little on the disk for a quick scan to find. That is why the advice is absolute: no website has a legitimate reason to make you paste anything into Run, Terminal or PowerShell.
I closed it, but it appeared again the next day. Why?
A page that returns on its own has a trigger. Look at how it appeared: from a pop-up in the corner of the screen means a notification permission; on start-up means a session restore or a changed start page; while browsing any site means an extension; on one particular site means that site's ads.
Each has a quick fix in the browser settings. If none of them explains it, reset the browser, which clears permissions, extensions and start pages together.
Which browser settings protect against fake alerts?
Three matter most. First, notifications: set your browser to ask before allowing them, and block sites you do not trust. Second, reputation checks: SmartScreen in Edge and Safe Browsing in Chrome warn you before known scam pages load, and Firefox has its own deceptive-content protection under Privacy & Security.
Third, pop-ups and redirects: keep the default blocking on. Add a reputable ad blocker if fake alerts keep reaching you through ads on sites you use. Review the notification list every few months.
Will Fortect remove Captcha-sourcecenter.com?
Fortect scans Windows for malware and unwanted programs and repairs the system files and settings they change, and its free scan shows what it finds on your PC before you decide anything.
For Captcha-sourcecenter.com, follow the plan above as well: the browser steps take back permissions and settings that no scanner treats as a threat, and uninstalling the program that brought it removes the source.
Run Microsoft Defender's full scan and, if anything was found, its offline scan as a second opinion. If the symptoms are gone after the plan and both scans are clean, there is nothing more to do.
Sources
- Wikipedia: Potentially unwanted program (read October 6, 2026)
- Cso: 9 types of malware and how to recognize them (read October 6, 2026)
- Virusai: Virusai (read October 6, 2026)
- FTC: How to spot, avoid and report tech support scams (read October 6, 2026)
- FTC: How to recognize, remove and avoid malware (read October 6, 2026)