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

How to Reset Windows Security Settings to Default

If Windows Security is blocking a trusted app, showing persistent warnings, or behaving oddly aft...

Fix Command Prompt Not Working After Windows Update

After a Windows update, you might click on Command Prompt and see nothing happen, or it flashes a...

Fix Redis Server Not Starting Due to Out of Memory Error

When Redis fails to start with an out-of-memory (OOM) error, it's usually because the system cann...

Fix Windows Security Authentication Error 0x80070035

Checklist: Windows Update Service Not Running in Services.msc

When you open Services.msc and see that the Windows Update service (wuauserv) is not running, or ...

Fix Windows Store Error 0x80073cf9 – Setup Guide

When you see error 0x80073cf9 in the Windows Store, it usually appears during app installation or...