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

Fix 'Putty Connection Refused' Error on Localhost

When you try to connect to localhost with Putty and get 'connection refused', it usually means th...

Fix Outlook Not Opening After a Windows Update

After a Windows update, Outlook may fail to start—showing no error, a loading spinner that never ...

How to Restore BitLocker Backup Without Recovery Key

If you've lost your BitLocker recovery key and need to access your backup data, you're in a tough...

Fix VirtualBox Kernel Driver Not Installed on Ubuntu

When you try to start a virtual machine in VirtualBox on Ubuntu and see the error 'Kernel driver ...

Windows Security Antivirus Configuration for Beginners

Windows Security (formerly Windows Defender) is the built-in antivirus in Windows 10 and 11. For ...

Fix Remote Desktop Permission Denied Error 0x80004005