I work at a small computer repair workshop where we sometimes get computers in where people have lost they're windows cd and so on. When trying to install with our CD they're key does not work sometimes even though its the same OS with the same service pack. What is the explanation for this? perhaps that our cd is older than theyre key? Would then a brand new CD work with ALL backwards keys? And is there any way around this problem? On some of these client computers we have just installed Windows with a standard cracked key (think it is a volume license key CG23X-...) Replacing the key afterwards with the original doesnt work either.
This ofcourse becomes a problem with Genuine Advantage Validation for our client.