Yesterday my computer was running fine, I haven't changed a single driver (I didn't even bother installing drivers when I formatted, Windows had it all covered). Today I turn my computer on: Please activate Windows. Weird, luckily I have my activation back up. I follow all the steps from the back up thread, boot back up: Please activate Windows. The watermark is back, personalize is locked up, I'm back to the start menu default theme. Did my computer/activation get black listed? Anyone experienced the same thing? Would re-installing Windows help? It'll suck having to install Windows weekly to "refresh" the activation. I'll just mess around a couple more times with the back up before giving up. Personally I'm not re-installing Windows till it's restarting my computer every 30 seconds.