Ok what is this folder all about? Its path is [drive]:\WINDOWS\prefetch. If I manually delete some malicious executable, then I can also delete the .pf files associated with that .exe from the prefetch folder as well, right? For example, I noticed a new folder called "network" in my program files. In it is this executable network.exe which I searched for in google and it's some malicious trojan thingy, so I deleted the whole folder (adaware & spybot didnt detect it). In the "prefetch" folder, however, there's these files called NETWORK.EXE-020C1601.pf and NETWORK.EXE-061013E8.pf. I should delete those too, right? And what happens if I dont delete them? I found em by just doing a search for network.exe in the windows search thing.