I added three V4s in that scene, render time was 9-10 minutes, core temperatures were about 50°C (123°F) while this was rendering.

http://img203.imagevenue.com/img.php?image=26870_Render_1_122_474lo.JPG

MSI errors? You mean errors when you try to install something? That's the only MSI that comes to my mind is installer MSI files. Installer errors could mean there is problem with your windows installation. Especially if it's been long time since it was reinstalled last time (if ever). I usually reinstall my OS' at least once a year.