Checklists for software errors, setup, and tool workflows.

Fix Chrome ERR_TUNNEL_CONNECTION_FAILED When Using VPN

You're browsing with Chrome and your VPN is on, but suddenly pages won't load and you see

Setting Up Windows Activation for Ubuntu VM

If you're running a Windows virtual machine on Ubuntu, you'll need to activate it with a valid li...

Fix Windows Security 'Failed to Start' Group Policy Error

You click the Windows Security icon in the taskbar or try to open it from Settings, but nothing h...

Fix Docker Build Error: 'failed to solve: manifest not found'

You run docker build and get an error like:

failed to solve: error fetching ...

Fix Windows Activation Dependency Conflict After Update

After a Windows update, you might see an activation error like “We can’t activate Windows on this...

Error 0xc004f074 Windows 10 Activation Fix

You see error 0xc004f074 when trying to activate Windows 10. It usually means the activation serv...