Checklists for software errors, setup, and tool workflows.

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Fix Windows Update Error 0x80070020: Port Already Allocated

When you see error 0x80070020 during a Windows Update, it usually means a program is already usin...

Fix Remote Desktop Connection Refused Due to Firewall

You try to connect to a remote Windows PC via Remote Desktop, but get an error like “Remote Deskt...

How to Fix Windows Defender Rate Limit Exceeded Error

If you're seeing a 'rate limit exceeded' error in Windows Defender (now Microsoft Defender for En...

Configuring Windows Defender for Ubuntu Dual-Boot Systems

If you dual-boot Windows and Ubuntu, Windows Defender may flag Linux partitions, boot files, or t...

How to Fix Command Prompt Permission Denied (Administrator Fix)

You open Command Prompt, type a command, and get access is denied or permissio...

Fix Windows Security Not Launching After Malware Removal
After removing malware, Windows Security may fail to launch or show a blank window. This is often...