I wasn't sure where to post this question, so if I'm in the wrong spot, moderators, would you please put me in the right spot?
I was going through the prefetch folder and noticed some things I knew were spyware/adware/virus related that none of the scanning tools caught, or removed. I deleted the obvious ones, but noticed that several were created near the same date that I got a bad spyware infection. Also, many of these files were created in 2005, and I've had this OS since 2003. Some I could recognize as belonging to programs I knew I had installed this year, but many weren't recognizable.
So I would like to ask: Are prefetch files "renewed" when a program has been modified, like say for instance, NAV receives updated definitions? Or are they re-written to when a program is opened (creating a modified date)? Is there someone who can look at the list of prefetch files and tell which are for bad things and need to be removed?