Most antivirus programs identify BrowserDefender.exe as malware—such as Microsoft identifies it as TrojanDropper:Win32/Rotbrow.A, and Symantec identifies it as Adware.GoonSquad.
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Description: BrowserDefender.exe is not essential for Windows and will often cause problems. BrowserDefender.exe is located in a subfolder of "C:\Program Files" or sometimes in a subfolder of the user's profile folder.
Known file sizes on Windows 10/8/7/XP are 2,827,728 bytes (50% of all occurrences), 2,847,696 bytes, 2,838,480 bytes or 2,838,992 bytes.
The program is not visible. BrowserDefender.exe is certified by a trustworthy company. It is not a Windows system file. BrowserDefender.exe is able to monitor applications and record keyboard and mouse inputs. Therefore the technical security rating is 39% dangerous.
Recommended: Identify BrowserDefender.exe related errors
Important: You should check the BrowserDefender.exe process on your PC to see if it is a threat. If Application Manager has changed your browser's search engine and start page, you can recover your browser's default settings as follows:Reset default browser settings for Internet-Explorer ▾
The following programs have also been shown useful for a deeper analysis: ASecurity Task Manager examines the active BrowserDefender process on your computer and clearly tells you what it is doing. Malwarebytes' well-known Banti-malware tool tells you if the BrowserDefender.exe on your computer displays annoying ads, slowing it down. This type of unwanted adware program is not considered by some antivirus software to be a virus and is therefore not marked for cleanup.
A clean and tidy computer is the key requirement for avoiding PC trouble. This means running a scan for malware, cleaning your hard drive using 1cleanmgr and 2sfc /scannow, 3uninstalling programs that you no longer need, checking for Autostart programs (using 4msconfig) and enabling Windows' 5Automatic Update. Always remember to perform periodic backups, or at least to set restore points.
Should you experience an actual problem, try to recall the last thing you did, or the last thing you installed before the problem appeared for the first time. Use the 6resmon command to identify the processes that are causing your problem. Even for serious problems, rather than reinstalling Windows, you are better off repairing of your installation or, for Windows 8 and later versions, executing the 7DISM.exe /Online /Cleanup-image /Restorehealth command. This allows you to repair the operating system without losing data.