Gibby's posts weren't particularly helpful.
You should send your license key, along with some form of proof of purchase (a scanned reciept e.t.c.) to the forum administrator, Mad_Fred, by Personal Message. DO NOT POST YOUR KEYS ON THE OPEN FORUM.
Your computer's processor is about 0.4GHZ under the minimum specifications, which may or may not be too muchunder to run SS08.
As for the Questviewer issue, I can't really help because I'm no expert on it. Hopefully someone who does know will be along shortly. But I do know that you shouldn't update Questviewer, no matter what.
It may be the case that we can't help you with the Questviewer issue until your keys are registered. This is because we have to know you actually own the game.Obviously, someone has managed to enter your license key. Like I said, Mad_Fred will fix it for you