Windows 10 sometimes freaks out because, initially, Microsoft Security Essentials and Windows Defender are the same tools. You might want to rely on an alternative anti-malware tool, so your device is checked properly and it can detect any PUPs or different applications. It shouldn't be the issue of Windows 10 updates since those bugs got patched recently. Users have this problem to this day and there are no different explanations than the cyber intruder that keeps showing suspicious messages and false alerts about Windows Defender issues. But that is not working for people, since the issue persists for a few years now. Microsoft stated that after upgrading to the newest Windows version, Microsoft Security Essentials should automatically uninstall itself. Typically the problem with removing Microsoft Security Essentials bothers users after they upgrade to Windows 10 from a previous version. To uninstall these files, you have to purchase licensed version of Reimage Reimage uninstall software.
