That’s a sill question I know but many don’t realize that Windows Vista update patches are free. Your windows is protected for the life of your computer and when security problems are discovered they are quickly patched. Hackers look for exploits in the software. Things that are basically weak spots the programmers didn’t anticipate someone getting in through. Hackers are cleaver and always trying to get into people’s computers. They provide programs with information however now days as when they do try to compromise a machine they leave a trail. Their are software programs called honey pots that give hackers the opportunity to penetrate a fake system so they can see what they will try.