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

How to Fix Outlook Rate Limit Error When Sending Emails

If you see an error like “You’ve reached the limit for sending email” or “Try again later” when s...

How to Set Up Windows Activation on Ubuntu Dual Boot

If you installed Ubuntu alongside Windows and now see an activation warning, you're not alone. Wi...

How to Fix Windows Defender Update Error 0x80070643

If you see error 0x80070643 when updating Windows Defender, it usually means the update failed to...

Fix Remote Desktop DNS Error 0x800704cf

When you try to connect to a remote computer using Remote Desktop (RDP) and see error code 0x8007...

Fix 'UFW Status Shows Port Not Active' Error

You run sudo ufw status and see a rule for a port, but the port isn't actually activ...

Fix VirtualBox Kernel Driver Not Installed on Windows 10