You will not have to buy a new product key. However, you can only use that key to activate Windows a limited number of times, so use it wisely. I think that the number of times you can use the product key is around five times.
Hi guys, I am having a few problems with my laptop, I need to reinstall windows to sort it out, I have already activated vista but if I reinstall it will I still be able to use the same product key to activate it or will i have to buy a new one? if so how much is the product key to buy?