It's a common occurrence that a computer breaks down, and you need it fixed. Leaving you three alternatives.
Call one of your local geeks, or if you have another working computer, talk to them online about it. Quick, if they're around, that is. And they don't always know the problem, but usually have a guess that might work.
Call out a professional. True, this costs, but generally is safest of these three choices.
Take it to be repaired. Oh my.
You'd think the last would be safe too, no?
Read this story. Read all of it.
Still sure it's safe?
Those of you who read my post on FireFox addons know I'm a very paranoid person about tracking and privacy as it is. This, however, bothers me more. The only way around this is practically to format your computer, or at the very least, uninstall everything, remove all browsing history, cookies, saved passwords, everything, and get it into as close a state to 'as new' as you can.