I work in a computer repair shop. We are constantly wasting time calling Microsoft to activate machines where the COA sticker has worn off and is unreadable. However we are able to pull valid OEM keys off the machine with Produkey, but we are never able to activate with these keys. Is there an easy, legitimate way we can use this key possibly with SLP to be able to activate these machines either online or offline? Microsoft is hit or miss whether or not they help us generate a new key and it takes hours fighting with them for a very common occurrence in the shop.