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

Nginx 502 Bad Gateway: A Practical Troubleshooting Guide

Seeing a 502 Bad Gateway from Nginx usually means the upstream server (like PHP-FPM, uWSGI, or a ...

How to Reinstall the Windows Security App (Microsoft Defender)

If the Windows Security app (Microsoft Defender) is missing, won’t open, or shows errors, reinsta...

Fix BitLocker High Memory Usage After Windows Update

Why BitLocker Memory Usage Spikes After an Update

After a Windows update, some users noti...

BitLocker Recovery Key Not Accepted: Fix Authentication Failed Error

Fix PowerShell Backup Restore Sync Errors Between Source and Destination

When using PowerShell scripts for backup and restore, sync errors between source and destination ...

Fix Chrome 'Connection Refused' on Linux Profiles

You launch Google Chrome on Linux, maybe with a specific profile flag, and instead of your browse...