Fast PDF Reader ads: what it is and how to remove it
Fast PDF Reader is an adware-type application. Since the app is promoted as a free reader for various file types (DOC, PDF, PPT, XLS), some people might install it intentionally, only later to find out that their browsers are now flooded with ads.
Facts checked October 7, 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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Fast PDF Reader ads: summary
| Distribution | Software bundling, third-party websites, misleading ads |
|---|---|
| Damage | Installation of potentially unwanted software; redirects can also lead to other malicious websites, resulting in financial losses or personal data disclosure to unknown parties |
| Name | Fast PDF Reader |
| Type | Adware, potentially unwanted browser extension |
| Symptoms | Shows intrusive advertisements on various websites; shows phishing and scam messages |
| Detection names | No Microsoft detection name is known |
| 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 4 more facts
| Evidence | 4 write-ups by security sites; details still limited |
|---|---|
| Program | Fast PDF Reader |
| First seen | 20 May 2022 |
| Facts checked | 7 October 2026 |
Is Fast PDF Reader ads dangerous?
From our report of May 2022 · not reviewed since
Fast PDF Reader is a browser extension that shows intrusive ads
Fast PDF Reader is an adware-type application.
Since the app is promoted as a free reader for various file types (DOC, PDF, PPT, XLS), some people might install it intentionally, only later to find out that their browsers are now flooded with ads. These ads might cover the whole screen, show phishing messages, and advertise other potentially unwanted programs, so we don't recommend interacting with them and removing the Fast PDF Reader from the system.
From our report of May 2022 · not reviewed since
Installation means
Adware is rather deceptive software, and this title does not only come from its operation but also from distribution.
While some users might install adware intentionally, believing that it can be a useful application, most people find it running on their devices seemingly out of nowhere.
At this point, many people believe that the application was installed by itself, which is not the case at all. Users always install it themselves, even though it is not intentional. There are two most common ways how this happens, which include:
Software bundling is one of the most common methods how potentially unwanted applications being spread.
To avoid being tricked by bundling, you should always pay close attention to the installation process of new apps - simply always assume that there's an additional application within the installer, and you need to deny its infiltration. To do that, always select Advanced/Custom instead of Recommended/Quick settings and never rush through steps - decline all the offers, watch out for misplaced buttons and read through the fine print.
Finally, you should never install software from websites that claim that your system is missing something or that it has been infected with viruses. This can only lead to various infections, which can be very devastating.
- Software bundles
- Fake updates/misleading ads.
From our report of May 2022 · not reviewed since
The fake features
Potentially unwanted applications are called so for a reason - they aren't wanted by most.
Indeed, they trigger intrusive advertisements that expose users' security to dangerous material online, disturb browsing sessions, and track data in the background. Yet, many people install the Fast PDF Reader intentionally.
Users are often unaware that adware disguised as a useful application can actually be harmful - they simply aren't aware that it's adware in the first place, as the symptoms often do not show up right away. Nonetheless, they are often lured by what seemingly looks like a useful feature and that it's just another browser extension.
Quite often, adware's functions are greatly overshadowed by its real purpose - to display intrusive ads. In some cases, the promoted features don't even work at all or are extremely benign. We have already observed this tactic used by PUPs like QuickPDFConverterSearch, Properties, StreamTopSearch, and many others.
In reality, adware is not only useless but can also prevent users from browsing without interruptions, all while being exposed to fake messages and misleading links. Below, you will find all the information needed to effectively get rid of the extension.
From our report of May 2022 · not reviewed since
More from our earlier report on Fast PDF Reader
- After PUP elimination, make sure you clean your browsers to prevent data tracking.
- can significantly quicken this process
How to remove Fast PDF Reader ads
How to remove the Fast PDF Reader extension
Do the browser steps in every browser and profile on the PC, then check Windows for the program that installed the extension.
Step 1: Remove extensions you did not add
Fast PDF Reader often works through an extension, so go through the extension list of each browser:
chrome://extensionsedge://extensions- Extensions and themes in Firefox
Switch suspicious extensions off one at a time and reload the page where the problem shows, then remove the one that stops it, and any other you did not add.
Remember the other browsers and profiles on the PC. If Remove is missing or greyed out, a policy forces the extension, which the policy step deals with. Windows 11 and Windows 10 show the same pages.
Chrome on Windows 11: More > Extensions > Manage extensions. Full procedure with screenshots: Remove a browser extension
Step 2: Uninstall Fast PDF Reader
Open Settings > Apps > Installed apps in Windows 11, or Settings > Apps > Apps & features in Windows 10.
Sort the list by install date and find Fast PDF Reader, then choose Uninstall from the three-dot menu next to it (in Windows 10, click the entry and then Uninstall).
Remove anything else installed on the same day that you do not recognise, because such programs usually arrive together in one installer. If the uninstaller opens a browser page with an offer or a survey, close it: the program is removed either way.
Full procedure with screenshots: Uninstall a program or app in Windows On uGetFix
Step 3: Reset the browser
Finish the browser part with a reset, which puts the search engine, start page, new tab page and site permissions back to their defaults and switches extensions off. Chrome: Settings > Reset settings > Restore settings to their original defaults.
Edge: Settings > Reset settings. Firefox: Help > More troubleshooting information > Refresh Firefox, which also removes its extensions. Your bookmarks and saved passwords are kept, and the menus are the same on Windows 11 and Windows 10.
Chrome on Windows 11: Settings > Reset settings. Full procedure with screenshots: Reset a browser and fix a hijacked search engine
Step 4: Scan the PC, then run the offline scan
Open Windows Security > Virus & threat protection > Scan options, run a Full scan and remove everything it finds. Then select Microsoft Defender Antivirus (offline scan) and click Scan now: the PC restarts and scans before Windows loads, which finds files that hide while Windows runs.
Save your work first, because the offline scan takes about 15 minutes. Both scans are built into Windows 11 and Windows 10, and a second scanner from another vendor is a useful extra opinion.
Windows 11: Windows Security > Virus & threat protection > Scan options. Full procedure with screenshots: Run a Microsoft Defender Offline scan
Choose a proper web browser and improve your safety with a VPN tool
Online spying has got momentum in recent years and people are getting more and more interested in how to protect their privacy online.
One of the basic means to add a layer of security - choose the most private and secure web browser. Although web browsers can't grant full privacy protection and security, some of them are much better at sandboxing, HTTPS upgrading, active content blocking, tracking blocking, phishing protection, and similar privacy-oriented features.
However, if you want true anonymity, we suggest you employ a powerful VPN - it can encrypt all the traffic that comes and goes out of your computer, preventing tracking completely.
Lost your files? Use data recovery software
While some files located on any computer are replaceable or useless, others can be extremely valuable.
Family photos, work documents, school projects - these are types of files that we don't want to lose. Unfortunately, there are many ways how unexpected data loss can occur:
- power cuts
- Blue Screen of Death errors
- hardware failures
- crypto-malware attack
- even accidental deletion
To ensure that all the files remain intact, you should prepare regular data backups. You can choose cloud-based or physical copies you could restore from later in case of a disaster. If your backups were lost as well or you never bothered to prepare any, can be your only hope to retrieve your invaluable files.
From our report of May 2022 · not reviewed since
Remove Fast PDF Reader adware
Adware can be installed as a browser extension or as a program on the system level.
In this case, if you want to remove Fast PDF Reader adware from your system, you have to access the settings of the browser and eliminate the extension from there.
Malware could be running in the background without you knowing anything about it, as it could hide its presence effectively. Thus, a scan with security software would guarantee that no such malicious programs are present on your device.
- 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 the suspicious plugins that might be related to the unwanted program by clicking Remove.
- 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 unwanted plugin and click Remove.
- Open Edge and click select Settings > Extensions.
- Delete unwanted extensions by clicking Remove.
- Click Safari > Preferences...
- In the new window, pick Extensions.
- Select the unwanted extension and select Uninstall.
From our report of May 2022 · not reviewed since
Clean the browser from trackers
As previously mentioned, adware often has tracking capabilities.
Cookies, web beacons, pixels, and other technologies are used to spy on users' activities online, including which websites they visit, which links they interact with, what they search for, and much more.
Besides, bloated caches might result in various errors or increase the probability of a dangerous session hijacking attack. Therefore, after deleting all potentially unwanted applications, you should also remove the tracking components from your browse. The easiest way of doing this (and fixing damaged system files at the same time) is by using . Alternatively, you can follow the steps below.
- 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.
- Click Menu and pick Options.
- Go to Privacy & Security section.
- Click on Clear Data...
- Select Cookies and Site Data, as well as Cached Web Content and press Clear.
- Click on Menu and go to Settings.
- Select Privacy and services.
- Under Clear browsing data, pick Choose what to clear.
- Under Time range, pick All time.
- Select Clear now.
- Click Safari > Clear History...
- From the drop-down menu under Clear, pick all history.
- Confirm with Clear History.
Questions about Fast PDF Reader ads
What is Fast PDF Reader and why is it on my PC?
Fast PDF Reader is a program that was installed on the PC, most likely together with something else you downloaded. Free software sites and many installers add extra programs on setup pages with pre-ticked boxes, so the extra install looks like your choice even though nobody read the page.
Check the install date in Settings, Apps, Installed apps: the program you installed that day is the probable carrier. If you do not need Fast PDF Reader, uninstall it. If it belongs to your hardware or to a program you use, search its exact name and publisher first, because drivers and their tools can have unfamiliar names.
How do I stop programs like Fast PDF Reader from being installed again?
Most unwanted programs arrive through installers, so the fix is in how you install software. Download programs from their official sites or the Microsoft Store, not from download portals or ads above search results. During setup, choose Custom or Advanced installation and untick every extra offer, including browsers, toolbars and optimizers.
Decline update prompts that appear inside other programs unless you know them. In Windows Security, turn on reputation-based protection and potentially unwanted app blocking. These steps would most likely have stopped Fast PDF Reader before it reached the app list.
Why is my browser so slow since the ads started?
Each page now does extra work. An adware extension reads the page, decides where to put ads, loads them from ad servers and reports your visit, and that happens on every tab. Ad-supported programs add their own background activity.
Removing the extension or program usually makes the browser fast again at once. If it stays slow, open the browser's own task manager with Shift+Esc in Chrome or Edge and look for extensions using a lot of memory or processor time.
My scan found nothing, but the ads continue. Why?
Because the source may not be a file a scanner looks for. Browser notifications are a permission stored in the browser, and many adware extensions are not flagged because they come from an official store.
Some ad-supported programs are only reported if you enable detection of potentially unwanted apps. So a clean scan does not mean the job is done. Check each browser's notification permissions and extension list by hand, and turn on Potentially unwanted app blocking in Windows Security before scanning again.
I let a "support technician" from an ad connect to my PC. What should I do?
Act quickly but calmly. Disconnect the PC from the internet first, so the connection ends. Uninstall the remote access tool they asked you to install and check Installed apps for anything else added during the call.
Run a Microsoft Defender full scan and offline scan. From another device, change your e-mail and banking passwords and sign out of all sessions.
If you paid by card, bank transfer or gift card, contact your bank or the card issuer immediately, and report the scam to the police. Do not answer if they call back.
Did Fast PDF Reader collect my data?
Adware typically collects what it needs to choose ads:
- the sites you visit
- search terms
- approximate location
- browser and system details
Extensions with permission to read and change data on all websites can technically see everything on those pages, including forms. That is a privacy problem rather than proof of theft.
If you typed card details or passwords while it was active, changing the most important passwords is a reasonable precaution. Clearing cookies after removal ends the tracking sessions it may have started.
Can an adware pop-up infect my PC just by appearing?
No. A pop-up, a notification or a new tab is only a web page or a message. It cannot run programs on Windows by itself, provided the browser and Windows are up to date. Infection needs a step from you:
- running a downloaded file
- installing an extension
- giving a stranger remote access
That is why scam pages work so hard to make you click. Close such pages with the tab's X or by closing the browser, not with buttons inside the page, which may start a download.
Do I need to reset my browser after removing Fast PDF Reader?
A reset is a good last step, because it undoes settings that the program changed. A reset restores the home page, new tab page and default search engine, and turns off extensions.
It does not delete your bookmarks or saved passwords in the main browsers. Add back only the extensions you trust, one at a time.
Will Fortect remove Fast PDF Reader?
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 Fast PDF Reader, 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
- NTT: Cookies and Web Beacons (read October 7, 2026)
- Norton: Session hijacking: What is a session hijacking and how does it work? (read October 7, 2026)
- Google Chrome Help: Use notifications to get alerts (no longer online) (read October 7, 2026)
- FTC: How to recognize, remove and avoid malware (read October 7, 2026)
- Microsoft Learn: Microsoft Defender Offline (read October 7, 2026)