A new (3months) PC running Windows 7 64bit, wireless keyboard and mouse. All programs/data were transferred from old PC using PC Mover. The keyboard has been returned twice - now using a 3rd one as we insisted there was a fault in the 1st two. The keyboard sticks and takes a long time for the typing to catch up. Then periodically, the system crashes totally with bsod. It has been returned to me twice, I ran a registry cleaner and hooked up wired keyboard, and reinstalled the antivirus - cannot fault it when I use it. Return to the customer and before long the problems reappear. The main program being used is MYOB - so it is always in the middle of a MYOB operation that problems arise. Sometimes, the keyboard is okay, sometimes not. I think that something that was transferred from the old Win XP 32bit system is causing the problem but what? and how to find it? Where should I start? Can you help me?