I got a OEM dvd for my laptop recently but i don't want to reinstall 7 home premium. Since it's prone to breaking, which requires me to take it in, i also dont' want to have any other versions on it which would rise suspicion. I found the file which seems to have the keys but when i try to activate it windows keeps telling me that they're not valid. Anyone know how to decipher this file? or it pointless?