A few weeks ago, I restored my computer to the factory image. I'm running Windows Vista Ultimate 32bit and haven't installed any service packs yet. About a week ago, however, I was randomly prompted to validate Windows again, even though I had (obviously) done it when I first restored my computer. I'm thinking this is when the problems started, but I don't really know how to pinpoint it, as I've been noticing new issues every couple of days. Either way, I now cannot do any of the following: install any updates with Windows Updateupdate antivirus definitionsconnect to Windows Live Messengerconnect to Steamload AIM Lifestreamload pages in IE 8 or Chromeuse anything but the "basic uploader" for pictures on Facebook or attachments on Gmail using FirefoxI'm sure there's more to add to this list, but I'm still discovering them as I go along. But I'm thinking it's a firewall or proxy issue, although Windows Firewall is disabled, and I don't know what else would be enabled. There is the possibility of it being a virus, though, right? Any suggestions for what steps I could take to figure this out?