Knowledge base for software setup, errors, and daily tool work.

UFW Port Closed Despite Allow Rule: Fixes

You've added a UFW allow rule for a port, but a port scan or service test shows the port is still...

Fix Ubuntu Task Scheduler Not Working After Update

After a system update, you may find that scheduled tasks (cron jobs or systemd timers) no longer ...

How to Locate Task Scheduler History Log in Windows 10

If you've set up scheduled tasks in Windows 10 and they're not running as expected, the Task Sche...

Fix 'Windows Security Authentication Failed' for Domain Credentials

How to Fix Cloudflare 521 Error on a WordPress Site

If you see a Cloudflare 521 error on your WordPress site, it means Cloudflare can't connect to yo...

Outlook Auto Start Not Working in Office 365: Fixes

You expect Outlook to open automatically when you sign into Windows, but it stays closed. This is...