No. You have an illegal copy of Vista which may already be compromised and which at some time you probably won't be able to download updates to. Either way, it may not be the bargain that you presumed.
You've already told us that you have failed exams recently because you didn't study properly. Perhaps you would be better to concentrate on that rather than playing up to your dodgy mate.
Do i care about updates?
There will be ways
Failed exams