Props go to cky32714 @ ieXbeta for this..
got the new SP2 and found out they blocked a number of keys, many ppl (i came to find out) were logged out and can not enter windows to restore or go back without a format. Well i stumbled upon a way to go in and remove the sp2 install so u dont have to reformat. When it says u must activate. Click "ok" or whatever, then go to activate over net. Then it should say somewehere on that page or the next at the bottom about to agreement and should take u to a website. (This is were Microsoft messed up) When u go on the site, go to the address bar and type in C: , That takes u to ur c: then u can go to control panel, thus taking u to system restore and or unisnatll manager were u can uninstall without the reformat. So ya there is a fix so u dont lose data and such! If you have any questions email me at ....
http://board.iexbeta.com/ibf10/index.php?showtopic=41284&hl=
Have fun!!