Today I was suddenly not being able to login to my windows xp professional system ( I still don't know why, but let's leave that out for the moment). So I used Knoppix-std to reset my administrator password. I was eventually successful, but when I entered with the new password, I encountered the "Activate Windows" dialog. It is then I realized that I had disabled the Syskey by mistake, while using the knoppix-std interface ( stupid me!!!). Anyway, my product key doesn't seem to work now and when I tried activating windows by calling Microsoft support, the changed key that they gave me doesn't work either!!! Is there any way that I can get this to work, or have I done the system some permanent damage?