I've installed Windows 8 Pro about a month ago. Everything has been doing good so far, apart from the "Homegroup" icon randomly appearing on the desktop.
Today however something strange happened: The boot was much longer than usual (Usually takes ~1min to boot into desktop, took ~5) and when it finished, I had 77 (!) Windows Explorer windows open, all on "system32". I managed to ctrl-alt-del into task manager to kill the processes (the computer was not much responsible) and log out/log in again, and everything went back to normal.
This got me worried, since it is a quite strange behaviour and might mean something nasty in my PC? How can I investigate/solve this?