How Much Money would it cost you to regain the use of your computer after a serious virus infection?

It cost one of our friends a whole lot of money, much aggravation and lost time, lost records, and a major inconvenience to recover from the havoc caused by the worms and viruses that had infiltrated their computer over a period of many months. Actually, our friends are like so many other people who use their computers primarily for communicating with family and their friends by email, sharing personal pictures, playing a few games, doing a little research now and then, making airline and hotel reservations, and maybe even balancing their check books. Surfing the internet for them was just a sometime thing, not necessarily a must-do daily routine. They were aware of computer viruses and had even heard of firewalls. Occasionally, public comments on TV and in newspapers about wide sweeping virus attacks with odd names like