Originally Posted by jameswalker
When I start windows and click on my username ... it says "This copy of Windows must be activated with Microsoft before you can log on" and I dunno what to do ... when i click yes it says "The problem is preventing Windows from accurately checking the license for this computer" "Error code:0x800040005"
Well since i can't keep this private.
It seems you might have a crack version of Win XP.
Lets go from there,or call the place where you bought it.