Sazza: you should have re-reported the problem when you first noticed it re-occouring. If you really rely on that computer as your only means of doing your work then letting it get to the point where it’s just not working before you even think about reporting it is NOT a clever idea
On the subject of relying on one computer; are you seriously trying to tell me that in this day and age you don’t have access to another computer you can use?
As for your exams, as I remember my little brother telling me a few weeks ago, they aren’t for another 9 months. You should be okay on that front.
On a different note; Good luck with your exams! :) I’ve been through those myself and went onto do a degree and 4 Microsoft certifications. If you want or need any help with them, then don’t hesitate to email me.
-The Blitz Man