Checklists for software errors, setup, and tool workflows.

1. Reproduce

2. Isolate

3. Apply

4. Verify

Latest checklists

You're trying to browse but Chrome shows 'ERR_PROXY_CONNECTION_FAILED' or 'Unable to connect to t...

If OneDrive stops syncing and you see errors like "Syncing paused" or "Changes being processed," ...

You try to open a file, run a program, or save a document, and Windows stops you with a 'Permissi...

After installing a Windows update, you may find that the Windows Update service (wuauserv) fails ...

You try to install a package with apt or dpkg, and you get the error: Could not get lock /v...

Fix Windows Security Proxy Error After Update
After a Windows update, you might see a proxy error in Windows Security (formerly Windows Defende...