Checklists for software errors, setup, and tool workflows.

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Fix Windows Update 502 Bad Gateway Related to Proxy Settings

If you see a "502 Bad Gateway" error when running Windows Update, it often points to a problem wi...

Fix SSH Host Key Verification Failed for GitHub

When you try to clone a repository or push to GitHub over SSH, you might see an error like:

Fix Windows Activation Failed Due to Dependency Conflict

You try to activate Windows, but get an error like “Activation failed due to a dependency conflic...

Reset Windows Defender Settings via Command Line

If Windows Defender is misbehaving—showing false positives, missing updates, or refusing to run—r...

Fix 'Port Already Allocated' Error on Windows 10 for Chrome

When launching Chrome or a web app that uses Chrome, you might see an error like "Port alread...

Windows Activation on Ubuntu: Troubleshooting Checklist
If you're running Windows in a virtual machine or dual-boot with Ubuntu and activation fails, the...