Checklists for software errors, setup, and tool workflows.

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Fix Windows Defender Proxy Error Not Working

You launch Windows Defender Security Center or try to run a scan, and you see a proxy error—somet...

Fix Windows Defender Not Opening Error 404

You try to open Windows Defender and get an error 404 – the page or resource can't be found. This...

Fix OneDrive Connection Refused Error 0x8004de40

You see OneDrive error 0x8004de40 with the message "Connection refused." This often happens when ...

How to Fix BitLocker Connection Refused Error Code

When you see a "connection refused" error related to BitLocker, it usually means the BitLocker Dr...

Fix Remote Desktop Version Mismatch (RDP 8.0)

When connecting to a remote desktop, you might see an error like “The remote computer req...

Fix Windows Search Proxy Issues When VPN Is Active
If Windows Search stops returning results when you connect to a VPN, the problem is often related...