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

Systemd Service Not Starting After Reboot: Practical Fixes

You've set up a systemd service, it runs fine when you start it manually, but after a reboot it s...

How to Fix BitLocker SSL Certificate Error

Symptoms

When you try to unlock a BitLocker-protected drive or enable BitLocker, you may ...

Fix Windows Activation High Memory Usage in Safe Mode

If your Windows system is using excessive memory (e.g., 80-99% RAM) and you suspect activation-re...

Fix OneDrive Files On-Demand Not Downloading Error

You click a file in File Explorer expecting it to download from OneDrive, but nothing happens—or ...

Fix Windows Update 502 Bad Gateway Connection Issue

When Windows Update fails with a "502 Bad Gateway" error, it usually means the update server can'...

Fix Windows Activation Version Mismatch After Hardware Change

After swapping out a motherboard or other major hardware, you might see an error that Windows act...