
Fix Windows Security Module Service Not Running
You open Windows Security and see a message that the service isn't running. The shield icon in th...
Software troubleshooting desk

You open Windows Security and see a message that the service isn't running. The shield icon in th...

You're browsing or running an app and Windows throws a security warning: the certificate is not t...

You try to unlock a BitLocker-encrypted drive on a different computer, and get an error about a v...

When you see a Windows activation error that mentions a proxy, it usually means the activation cl...

If you suspect Windows Security (formerly Windows Defender) is not detecting threats, you might s...

After a Chrome update, you might find your profile—bookmarks, history, passwords, extensions—seem...