Are you running both Hard Drives now? The old one as a secondary and new on on Primary, If you transferred files over directly you may possibly have a nasty bug that you running into with one of your files. Especially since it happens when on the internet. This even more likely if you brought over your old emails and one of them was infected.
*edit*
Just read locks on games too, Try disconnecting PC from the net and running those games, or also try surfing the web in safe mode with networking . And seeing if that works.
If safe mode with networking works fine your hardware should be all good one may assume (besides drivers...)
*edit*
Just read locks on games too, Try disconnecting PC from the net and running those games, or also try surfing the web in safe mode with networking . And seeing if that works.
If safe mode with networking works fine your hardware should be all good one may assume (besides drivers...)