When I bought my computer at Best Buy, they installed Norton. Now everytime I turn my computer on, it says I need to update and puts me thru heck trying to log on until I push Cancel. It says my protection has expired. I just want it off there and need to know how to get free virus protection. How can I get that off my computer?

My computer is really messed up but it didn't come with any sort of disk…Its a Compaq. On the tower it says Compaq Presario SR1403WM. We bought it from a store. I think Best Buy or something but anyways it would be way out of warrenty by now. It has been years. I want to start it fresh (system restore wont cut it) and even if I did find a way to start fresh it didn't come with a windows XP disk to reinstall….My mom would have thrown the receipt away by now. HELP?

When you go to the GeekSquad at Best Buy they charge atleast 69 or up to 200 dollars in some places for a diagnostic and all they do is run some software that finds out where the problem is. I don't have that kind of money and I need a way to find out what is wrong with my computer whether it be a software or a hardware issue.

So I need to know what is the name of this software or anything similar to this that can check both hardware and software issues.