<A target="_blank" href="http://www.pcworld.com/article/174342/Windows_7_Upgrade_Woes_Mount_Endless_Reboots_and_Product_Key_Problems.html?tk=rss_news">Questions have been flowing into Microsoft upgrade forums since</A> the release of Win7. It seems a number of people have run into difficulties upgrading from Vista and many aren't happy with the response from Microsoft.