![]() ![]() This is all normal with any antivirus program, all of which need to use some system resources to check your PC and keep you protected. But the background scans shouldn’t run while you’re using your PC. However, it may still use CPU resources performing updates or scanning files as you open them, even while you use your computer. Windows Defender generally performs background scans only when your computer is idle and isn’t being used. This CPU usage could also indicate that it’s installing an update, or that you just opened a particularly large file Windows Defender needs some extra time to analyze. It also scans files when you open them, and regularly installs updates with information about new malware. ![]() Like other antivirus tools, Windows Defender performs regular background scans of the files on your computer. If you see the Antimalware Service Executable process using a large amount of CPU or disk resources, it’s likely scanning your computer for malware. ![]()
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