Windows 7 Phillips SPC230NC WEBCAM PROBLEMS

Just bought this webcam from buy.com Tryed to load it on win7...didn't work..so i reformatted my computer completely. Tried it again and still didn't work....so i loaded on my Xp computer..it worked.. vista....it worked... So what's going on?? I get this box after isntall that says.... " This version of windows requiers all driver to have a valid digital signature. the dirver is unavailable and the probgram that uses this driver might not work correctly"

So i e-mail phillips, im sure nothing will come of that...

WHAT SHOULD I DO??????????

is there anything? HELP!!!

Thanks,
George