What is Superfetch?? Quite often i get a message popping up saying this has stopped working and often get a message about something to do with Host Service has stopped working. What do these mean exatly as it is rather annoying. I have noticed that when one of these messages has popped up Windows Aero does not function untill a restart has been done. and no doubt this is related somehow. I know i have all the latest drivers for all applications that need them and Windows is upto date too. Thanks all. Phil.