I ran Windows 7 updates on the 1st of May and subsequently lost all access to the internet. My ADSL line was active and I was able to ping my service provider, but could not send or receive email, get onto the internet with IE or Google, or connect to Skype. It took me a few days to figure out what happened. I eventually did a system restore and everything started working again.
Not going to be running any updates again in a hurry!