Checklists for software errors, setup, and tool workflows.

Firefox Secure Connection Failed Only on WiFi: Fixes

If Firefox shows a "Secure Connection Failed" error only when you're on WiFi—but the ...

Fix 'git pull failed index.lock file exists' Error

When running git pull, you may see an error like:

fatal: Unable to create &#...

How to Fix Firefox Secure Connection Failed Certificate Error

You see a full-page error in Firefox: Secure Connection Failed with a message li...

Fix Error 0x80070080 When Windows Update Stuck

You see error 0x80070080 and Windows Update hangs at a certain percentage. This usually means a p...

Fix Chrome Certificate Error: Invalid Authority SSL Certificate

If Chrome shows 'Your connection is not private' with 'NET::ERR_CERT_AUTHORITY_INVALI...

Chrome Sync Not Working with VPN: Fixes and Checks

If Chrome sync stops working after you turn on a VPN, you're not alone. The VPN can interfere...