Checklists for software errors, setup, and tool workflows.

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OneDrive Sync Error 404 Not Found: Causes and Fixes

You open OneDrive and see a '404 Not Found' error during sync. This usually means OneDrive can't ...

Fix Windows Defender Token Expired Group Policy Error

You may see a Windows Defender error like 'Token expired' or 'The token is expired' in the Window...

UFW Deny Port But Still Accessible: Fixes and Checks

You set a UFW deny rule for a specific port, but the port remains accessible from outside. This i...

GitHub Actions Workflow Stuck Pending: How to Fix

You push a commit expecting a workflow to run, but it sits in a pending state for minutes or hour...

How to Fix PowerShell Unable to Connect to Proxy Server

When PowerShell fails to connect to a proxy server, you might see errors like Unable to con...

How to Fix DNS Probe Finished NXDOMAIN on Chrome (IPv4/IPv6)
You're browsing in Chrome and suddenly see "DNS probe finished NXDOMAIN" — meaning the domain nam...