If the hard drives are SATA, the problem with the Remove Hardware option can occur. I'm sure theres a way of stopping it though. I just don't know how
As for that error, thats a bit weird. It could easily be a bad RAM stick but I can't be sure.
If you have more than 1 stick installed, take one out and try it. If that works, try the other one, until you find the culprit.