Recently my PC was re-built from scratch and setup w/ Windows 7 Enterprise. Since then (3 days ago) I have been crashing routinely upon opening or closing files. I've installed all the latest updates and have updated my display adapter driver and repaired my installation of AutoCAD. The good thing is that I've been trained to save very frequently because of this. The bad thing is that I'm constantly having to open AutoCAD back up because of the fatal errors

Anyone else experiencing similar issues or know of a solution?