Checklists for software errors, setup, and tool workflows.

Fix Windows Defender Error 0x80070643 – Version Mismatch

You update Windows Defender and see error code 0x80070643. The update fails, and Defender may dis...

Fix Windows 10 Product Key Not Working After Hardware Change

You replaced a major component—often the motherboard—and now Windows 10 says your product key isn...

Fix Microsoft Store 404 Page Not Found Error

When you browse the Microsoft Store and encounter a 404 page not found error, it usually means th...

Fix BitLocker 502 Bad Gateway During Recovery Key Retrieval

When you're locked out of a BitLocker-encrypted drive and the recovery key page returns a 502 Bad...

Fix CMD Service Unavailable Due to Group Policy

Situation

You open Command Prompt and see an error like "Command Prompt has been disabled...

Fix Windows Update Error 504 Gateway Timeout

You're trying to run Windows Update and get a '504 Gateway Timeout' error. This typically means t...