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

Fix Windows Activation Cache Corruption

You try to activate Windows, but the activation fails with an error like '0xC004F074' or 'The act...

How to Fix Error 0x80070005 When Windows 10 Update Fails

When Windows 10 update fails with error 0x80070005, it usually means the update installer lacks p...

How to Fix Command Prompt Keeps Crashing in Windows 10

If Command Prompt opens and then immediately closes, or crashes randomly while you're using it, y...

Fix VirtualBox Kernel Driver Not Installed on Windows 10

How to Repair an Outlook Data File (.pst/.ost)

If Outlook suddenly won't open, shows error messages about a data file, or you can't see certain ...

Fix Outlook Port Already Allocated in Exchange Server

When Outlook cannot connect to Exchange Server and you see an error like “Port already allocated”...