I am running Windows Server 2008 R2 on my notebook and experiencing a strange issue. Internet Explorer and Firefox can access the internet. Apps like Tweetdeck, Blackberry Destop Manager and Word (publishing a blog to Wordpress) can't get to the internet. This happens on my network or others. Wired or wireless makes no difference. The firewall is off. It seemed to be intermittent, one day Tweetdeck would work the next it wouldn't (starting from boot not sleep or hibernate). I looked over the changes I had made to the system and had installed WinPCCap to play with Firesheep. I removed those with no effect.