ok well the lock up could be beacuse there is to many programs running at once or there is not enough memory to support the program running it could just be a windows problem and you might have to reinstall windows get more memory or run a msconfig or worse case it might be spyware
When a computer is locked up it is often running at full speed, executing data that was never intended to be used as a program. Even though the computer is running, you see nothing happening because the display is not being updated properly by the runaway central processing unit.