Well that sounds like it's more a problem with your windows installation than with Poser if all these other unrelated programs are having issues. Still, if you're having problems you should contact Tech Support.  I know when I switched my desktop to Win8, I had to reinstall some of my old software (not Poser but still) to get them working. My printer/scanner combo only prints under win 8 sadly. So I feel your pain. Contact support.