Hi, It's my understanding that starting March 11th, those who are running W7 RC1 will experience an auto shutdown every 2 hours. Then, in June, the RC1 will lock you out of your system. Even if you buy the retail copy of W7 before June, there is no way to do an in place upgrade, rather, you have to do a clean install of your OS. So, if you have applications, documents, etc on W7 RC 1, you'll have to back them up, wipe your hard drive, install the retail version of W7, then reinstall all your apps/docs. Why doesn't Microsoft just let users who pay for the full version upgrade? I downloaded W7, build 7127, which, as I understand it, is from the RTM family, rather than the beta testing/RC side. Will this version also begin to self-destruct starting in March (w/2 hour shut downs) and move into complete obliteration in June? If so, will I be able to upgrade using the full retail version? If so, this is a good reason for people to download 7127, as opposed to RC1 7100.