incrediBILL - 11:42 pm on Mar 4, 2010 (gmt 0)
Home users don't have the financial means nor the time or spare machines to do this.
Not a problem.
Some people can't maintain their autos either and when they go belching down the road they get sent home by the police until they can afford to repair the car.
If you're an egregious polluter, either on the road or the internet, and can't afford to fix the problem then you don't get to come out and play.
Quite simple really.
Another alternative to cleaning the PC is simply reload it with Ubuntu, Firefox or Chrome, and Open Office.
Problem solved and it'll run faster.