During installation, some people seemed to have conflicts with their antivirus and firewall software, though I can not confirm this. You might want to download and install the latest drivers for your graphics card, if you haven't done so lately.

BillyWitchDoctor.com recommends lighting some candles and waving a dead chicken over your hard drive while reciting the "sofa-king" incantation.

Also, do you have a fog machine handy?