BookLot ads: what it is and how to remove it
BookLot is adware falsely marketed as a Wikipedia tool that actually floods your screen with invasive advertisements and tracks your browsing behavior. It spreads through software bundling and fake Flash Player updates.
Facts checked October 5, 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.
Automatic
Get a free scan and check if your PC is infected.
Fortect finds malware, unwanted programs and the Windows damage they leave behind, and repairs it in one pass.
Programs like BookLot usually arrive in groups; a free scan lists the companions that are easy to miss.
Do it yourself · free Remove BookLot ads yourself 5 steps, about 15 minutes, no software needed.
Start the steps
BookLot ads: summary
| Distribution | Official website, software bundling, fake Flash Player updates |
|---|---|
| name | BookLot |
| Type | Adware, potentially unwanted program, redirect virus |
| Symptoms of infection | Device and the internet connection are slower; more than usual ads on your frequently visited pages; redirects to untrustworthy websites |
| Dangers | Privacy issues, installation of additional PUPs, malware infections, financial losses |
| 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 7 more facts
| Damage | Not recorded in the old report |
|---|---|
| Name | BookLot |
| Symptoms | An unknown program in Installed apps |
| Evidence | 4 write-ups by security sites; details still limited |
| Program | BookLot |
| First seen | 20 July 2021 |
| Facts checked | 5 October 2026 |
Is BookLot ads dangerous?
From our report of Jul 2021 · not reviewed since
BookLot ads – an outcome of an adware infection
BookLot is falsely advertised as a useful addition to your device that will let you search for information on Wikipedia, the free online encyclopedia.
In fact, it's a potentially unwanted program (PUP) that will harshly impact your browsing sessions by displaying a myriad of ads.
They will come in various forms, from pop-ups to banners and in-text hyperlinks. The worst part is that they originate from a different source than the sites you're visiting and thus, could cause a lot of trouble. PUP developers don't care where their money comes from, so some of the deceptive BookLot ads might lead you to dangerous domains.
Some of them might try to lure out your private details (name, address, phone number, credit card information, etc.) through tech support scams, others to instantly infect your device in use with severe malware (ransomware, trojans, etc.) via drive-by downloads.
Therefore, before using this app, you might ask yourself, why should I endanger my privacy and security by using a shady application if I can just go to Wikipedia.org and find whatever I need straight from the source. We advise you not to download or use this program. If you already have it, we'll show you how to get rid of it safely.
It's worth mentioning that most adware has data-tracking capabilities. IP addresses, geolocation, frequently visited sites, clicked links, and other non-identifiable information is collected to customize BookLot ads specifically for you and make them irresistible.
Although adware developers swear that this information is meant just for them, there were numerous incidents where the collected user data was shared with or sold to third parties. That's another reason to reconsider using the services of the article's culprit.
In some cases, adware might infiltrate your device without your knowledge. That happens when you rush through the installation of software, especially if it's downloaded from a third-party vendor. Software bundling is a widely used technique to spread PUPs.
The trick is that you're not informed of additional installers that are hiding within the bundle and that are installed as soon as you choose Recommended, Quick, Standard modes.
Next time you download apps from a shady software vendor, pick the Advanced or Custom mode and go step-by-step through the whole process, declining the installation of all untrustworthy, suspicious apps. If you're on the fence about any of them, check if we haven't already written about it.
From our report of Jul 2021 · not reviewed since
More from our earlier report on BookLot
- Adware can cause various system issues.
- Repair them and delete all tracking cookies by performing system diagnostics with the software
How to remove BookLot ads
How to remove BookLot
Uninstall first, then remove what stays behind, so the ads do not come back after a restart.
Step 1: Uninstall BookLot
BookLot is removed like any other program, from the list of installed apps. In Windows 11 that is Settings > Apps > Installed apps, in Windows 10 Settings > Apps > Apps & features, and in both you can also use Control Panel > Programs and Features.
Select BookLot, click Uninstall and follow the uninstaller to the end. Then look at the entries just above and below it when the list is sorted by date: bundled programs install at the same minute.
Full procedure with screenshots: Uninstall a program or app in Windows On uGetFix
Step 2: Remove it from startup
Press Ctrl + Shift + Esc to open Task Manager and select Startup apps (Windows 11) or the Startup tab (Windows 10). Disable entries you do not recognise, especially ones with no publisher or with a name that copies a Windows component.
Right-click an entry and choose Open file location to see where it runs from: programs in
%AppData%or%Temp%deserve a closer look. Some entries are not listed there but in the registry Run keys, which the procedure below shows how to check.Full procedure with screenshots: Stop apps from opening at startup On uGetFix
Step 3: Delete the folders left behind
Uninstalling often leaves the program's folders, and some threats reinstall themselves from them.
Press Windows + R, type
%LocalAppData%and press Enter, then do the same for%AppData%and %ProgramData%, and look for folders named after BookLot, its publisher or created on the day the problem started. Delete those folders, and check C:\Program Files and C:\Program Files (x86) too.If Windows says a file is in use, end it in Task Manager or delete the folder after a restart in Safe Mode. The folders are the same in Windows 11 and Windows 10.
Full procedure with screenshots: Remove what malware leaves behind in Windows
Step 4: Reset the browser
A reset removes what the steps above could miss:
- changed start pages
- site permissions
- hidden settings
In Chrome open Settings > Reset settings > Restore settings to their original defaults; in Edge Settings > Reset settings; in Firefox Help > More troubleshooting information > Refresh Firefox.
Tip: Bookmarks and saved passwords stay, while extensions are turned off and the search engine and start page return to the defaults.
Reset every browser on the PC, including Edge, which Windows 11 and Windows 10 always have.
Chrome on Windows 11: Settings > Reset settings. Full procedure with screenshots: Reset a browser and fix a hijacked search engine
Step 5: Scan the PC, then run the offline scan
A scan finds the parts of BookLot 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
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 Jul 2021 · not reviewed since
Two methods to remove BookLot adware
Potentially unwanted programs can be installed on the device as apps or browser extensions.
This chapter will help to deal with adware if it's installed as the former variant. Adware tends to install in a different name than the app itself, making the manual removal a bit tricky.
This way, you can rest assured that all PUPs and their related files and entries are found and terminated. Moreover, such software will prevent you from installing any PUPs and protect your device from severe malware infections.
While removing a PUP manually, you could overlook some associated files, and that could cause infection renewal. If you still want to try doing it yourself, at least let us help you by providing guidance. Follow these steps to remove adware from Windows 10/8 computers:
Apple products are also susceptible to potentially unwanted program infections. The distribution methods are fairly similar. Therefore if you see any of the abovementioned symptoms when browsing with your Mac, please use this illustrated guide to clean it up:
To fully remove an unwanted app, you need to access Application Support, LaunchAgents, and LaunchDaemons folders and delete relevant files:
If you haven't found BookLot uninstaller or want to make sure that the potentially unwanted program is completely eradicated from your device, download the security software and perform a full system scan. It will reveal all cyber infections and associated entries.
Please be advised that cybercrime is on the rise, and a trustworthy anti-malware tool is your frontline defense against various malware types.
- Enter Control Panel into Windows search box and hit Enter or click on the search result.
- Under Programs, select Uninstall a program.
- From the list, find the entry of the suspicious program.
- Right-click on the application and select Uninstall.
- If User Account Control shows up, click Yes.
- Wait till the uninstallation process is complete and click OK.
- From the menu bar, select Go > Applications.
- In the Applications folder, look for all related entries.
- Click on the app and drag it to Trash (or right-click and pick Move to Trash)
- Select Go > Go to Folder.
- Enter /Library/Application Support and click Go or press Enter.
- In the Application Support folder, look for any dubious entries and then delete them.
- Now enter /Library/LaunchAgents and /Library/LaunchDaemons folders the same way and terminate all the related .plist files.
From our report of Jul 2021 · outdated details corrected in October 2026
Illustrated instructions to eliminate suspicious browser extensions and clean up the system
As we've pointed out earlier, the article's cuprit might also be installed as a browser extension.
So even after finding and deleting it with anti-malware software, you have to check for suspicious extensions on every browser installed on your device. Since you came to us for help, we'll also guide you through this process.
It will take about 10 minutes to clean all browsers, depending on how many you have. We're providing instructions for the three most popular ones - Google Chrome, Microsoft Edge, and Safari. If you need instructions for other browsers, please contact our staff, and they will provide them to you.
Once you complete this step, the irritating ads and redirects will stop forever. Here are instructions to remove BookLot extension from the Chrome browser:
Once you remove the article's culprits and any other shady plug-ins from Chrome, you will need to do the same for Safari. It's a fairly simple process, but we still have an illustrated guide for it, so there won't be any hiccups:
Since Microsoft Edge is the default browser on all new Windows devices, it's safe to assume that it might be infected by adware aswell. Therefore to stop BookLot ads from disrupting your browsing sessions, you must remove all questionable extensions from Edge:
Once all these steps are completed in succession, the potentially unwanted program will be completely terminated. That means no more BookLot ads, redirects, slowdowns, and similar shady functions. The next step is to remove all tracking cookies that might be stored on your device by mischievous portals.
If you have multiple browsers, that might take a while. In addition, cybersecurity experts state, that it will detect all alterations to system files and settings that the potentially unwanted program has made.
If these changes are neglected and left unattended, your device might exhibit various abnormal behavior, such as BSoDs, severe lag, freezing, etc. While after using the all-in-one optimizer, the device will run as well as new. In the future, before installing any unknown apps, please check if we haven't written about it, so you'll know if it's a PUP or not.
- 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.
- Click Safari > Settings...
- In the new window, pick Extensions.
- Select the unwanted extension and select Uninstall.
- 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 on Uninstall at the bottom.
Questions about BookLot ads
What is BookLot adware?
BookLot is a potentially unwanted program falsely advertised as a useful tool providing Wikipedia search functionality. In reality, it functions as adware that generates revenue through aggressive advertising. BookLot displays a myriad of advertisements in various forms including pop-ups, banners, and in-text hyperlinks injected into websites you visit.
The ads originate from sources unrelated to the websites themselves, creating unpredictable and often intrusive browsing experiences. BookLot developers demonstrate complete indifference to ad origin and safety, so some advertisements lead directly to dangerous domains containing malware, phishing scams, or identity theft attempts designed to exploit unsuspecting users.
How does BookLot spread?
BookLot spreads primarily through software bundling with freeware installations and official bundled packages. The adware may also arrive through fake Flash Player updates and deceptive advertising campaigns. During freeware installation, when users select Quick or Recommended installation modes, BookLot installs automatically without notice.
The PUP relies on user negligence during the installation process where bundle components hide until installation completes. Some victims download BookLot directly from its official website believing false claims about Wikipedia integration. Third-party vendor downloads and bundled software packages represent the most common infiltration vectors.
What damage does BookLot cause?
BookLot severely impacts browsing experience through aggressive ad injection on frequently visited websites. Device and internet connection performance noticeably slow from the adware's resource consumption. Your screen fills with more advertisements than usual appearing unexpectedly.
The adware redirects you to untrustworthy websites designed to compromise security. Most significantly, BookLot employs data tracking to collect IP addresses, geolocation, frequently visited sites, clicked links, and other non-identifiable information.
Although developers claim collected data serves only internal purposes, numerous incidents revealed user data sharing or sale to third parties without consent. This tracking enables targeted scams and fraud.
What data does BookLot track?
BookLot collects comprehensive behavioral data including your IP address, precise geolocation information, all websites you frequently visit, links you click, search terms you use, time spent on different websites, and potentially personally identifiable information. Advertisers use this detailed profile to customize BookLot ads specifically for you, making intrusive content appear more relevant and increasing click-through rates.
The data enables behavioral marketing strategies targeting your specific interests and vulnerabilities. While developers deny sharing information, multiple adware incidents proved this data was shared with or sold to advertising networks and third parties. Aggregated information may enable identity theft, phishing campaigns, and fraud targeting your specific interests and behaviors.
How do I remove BookLot adware?
The safest removal method uses professional anti-malware software designed to detect and eliminate PUPs. Download and install reputable security software from a clean device if necessary.
Update the anti-malware program to ensure it detects the latest BookLot variants, then run a complete full system scan. The security tool will identify BookLot and associated files that manual removal might miss.
System optimization software can repair damage and delete cookies left by the adware after removal. Run multiple scans to verify complete eradication. Manual removal is possible but risky because adware often installs under disguised names making complete identification difficult.
Can I manually remove BookLot?
Manual removal is possible but challenging and risky. Adware typically installs under names different from the application itself, making identification difficult. Manually locate BookLot-related entries in Control Panel's Programs list and remove them.
Check your browser extensions and remove any suspicious or unfamiliar plugins. Clear browser cache, cookies, and history through browser settings. However, this manual approach frequently overlooks associated files and registry entries that allow the infection to renew.
Professional anti-malware tools are more reliable for identifying and removing all BookLot components system-wide. Manual removal failure rates are high, making automatic removal the safer and more effective option.
What browser extension removal is necessary?
Even after system cleanup removes BookLot application files, the adware may persist as browser extensions you never intentionally installed. Access your browser's extension or add-ons menu and identify suspicious entries with unfamiliar names. For Chrome, click Menu then More Tools then Extensions.
For Firefox, click Menu then Add-ons. For Edge and Safari, similar options exist in their respective settings. Click Remove or Uninstall for any suspicious extensions.
Verify your browser's homepage, search engine, and new tab page are set to your preferred defaults. Clear cookies and cached data through history settings. Some legitimate browser extensions appear suspicious, so research unfamiliar entries before removal to avoid accidentally removing helpful tools.
How can I prevent BookLot installation?
Prevention requires careful attention during software installation. Always select Advanced or Custom installation modes instead of Quick or Recommended options that hide bundled programs. Step through each installation screen carefully, declining installation of all untrustworthy or suspicious additional applications.
Read Privacy Policy and End User License Agreement documents before installing free software to understand what you're approving. Only download applications from official developer websites and legitimate app stores, avoiding third-party download portals known for bundling malware.
Enable anti-malware software that warns during installation if suspicious bundled programs are detected. A small amount of installation vigilance prevents most PUP infections effectively.
Will Fortect remove BookLot?
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 BookLot, 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
- Howtogeek: PUPs Explained: What is a "Potentially Unwanted Program"? (read October 5, 2026)
- Dieviren: Dieviren (read October 5, 2026)
- Google Chrome Help: Use notifications to get alerts (no longer online) (read October 5, 2026)
- FTC: How to recognize, remove and avoid malware (read October 5, 2026)
- Microsoft Learn: Microsoft Defender Offline (read October 5, 2026)