I have this weird computer hang. I am able to use the mouse, but I am not able to open any programmes such as internet explorer, my computer, my documents, microsoft word ect.. When I try to open a programme, there is no dialogue bar saying can't find file pathway or anything, so when I try to click on a file, nothing happens, like it's as if I didn't try to open a file at all. Also, I can't see any of my recently opened programmes in the start menu, and I can't open the arrow that shows the shut down button. I then need shut down my computer by switching users to go to the user login page and shut down the computer from then and then turn on the computer again, afterwhich everything is okay. This only happens when I am not using the computer, when I leave the computer logged on overnight or for a few hours or something, but it also once happened within 10 minutes when I was away from the computer. However, it hasn't happened while I am using the computer yet. However, I am able to close previously opened programmes, open msn although I am not able to log in, open the start menu, volume control, view the time and date and open task manager. However, the task manager doesn't show any applications running when I try to open a programme, so it's not like the programme is slow in opening or is not responding or something. Can anybody tell me what's the problem and how to fix it? I use a vista. Thanks.