Checklists for software errors, setup, and tool workflows.

Fix Command Prompt Not Working After Windows 11 Update

After a Windows 11 update, you might find that Command Prompt won't open, crashes immediately, or...

How to Fix Windows Security Keeps Crashing

If Windows Security (formerly Windows Defender) keeps closing unexpectedly, you may see error mes...

Fix Windows Update High CPU Usage and Error 0x80070002

When Windows Update runs, you may see high CPU usage and eventually error 0x80070002. This usuall...

Fix Git Clone Permission Denied (publickey) on Bitbucket

You try to clone a Bitbucket repository and see:

Permission denied (publickey).
fatal: Co...

Fix Putty Connection Refused on Port 22

You try to connect to a remote server with Putty on port 22, but you get 'Connection refused'. Th...

Cloudflare SSL Certificate Installation Steps

If you're seeing SSL errors after setting up Cloudflare, or your site shows a mixed content warni...