Checklists for software errors, setup, and tool workflows.

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 DNS Server Not Responding in Windows Search

When you search for network printers, shared folders, or other devices from the Windows Search ba...

How to Fix Command Prompt Authentication Failed Error

When you see “authentication failed” in Command Prompt, it usually means the system couldn’t veri...

Fix Microsoft Store 404 Error: Practical Steps That Work

When you open Microsoft Store and see a 404 Not Found error, it usually means the store can't loa...

Fix Windows Update Cleanup Stuck: Practical Steps

You run Disk Cleanup, select Windows Update Cleanup, and it sits at 0% or hangs ...

Fix OpenVPN Permission Denied on Tun Device

When running OpenVPN, you might see an error like ERROR: Cannot open TUN/TAP dev /dev/net/t...