Not without knowing what is causing the freezing as it is not actually causing a crash.

This sounds like at first guess that it is a hardware interrupt / bad device driver causing this, as for banging the keyboard - this is most likely just down to luck.

Try first looking through your system event log for any errors or warnings that could be driver related.

Next either uninstall the driver or if you do not find anything, I would first advise unplugging all extra USB devices as the easiest solution, then if that solves it, plug them in one by one until you find the bad one. If you do not find anything, you may actually need to uninstall drivers.

If you still have errors or want to rule it out earlier, I would advise running a memory test, and going to the command prompt to run a Chkdsk to scan the hard drive for problems.

I used to get this all the time on old machines, 99% of the time it was people buying cheap/unknown brand devices with VERY bad drivers - it gives Windows a bad name. If however you still getting problems after following this, please say and I will try to help further.