Knowledge base for software setup, errors, and daily tool work.

Fix 'Windows Security Application Not Found' on Ubuntu

When running Windows applications through Wine or PlayOnLinux on Ubuntu, you might see an error l...

How to Fix Windows Security Backup Not Working

Windows Security backup (part of Windows Backup or File History) may stop working for several rea...

Fix Microsoft Store Connection Refused Due to Proxy Settings

If you see a 'connection refused' error when opening Microsoft Store, your system's proxy setting...

Fix Windows Activation Cache Corruption

You try to activate Windows, but the activation fails with an error like '0xC004F074' or 'The act...

Fix OneDrive Sync Error 0x8004de40 on Windows

OneDrive sync error 0x8004de40 usually appears when you try to sign in or sync files. The error m...

Fix VirtualBox Kernel Driver Permission Denied on Linux