I was trying to clean up some startup items by using msconfig in Windows XP. I believe I did uncheck some logitech programs for my wireless usb mouse (maybe keyboard as well). When I restarted it, my mouse didn't move at all. I can't use it to log in any accounts. I don't know if there is keyboard shortcut for account selections. It seems no response at all. But F2, F8 or F12 seem work during the start up process. However, even I tried to log in under the safe mode, I still ran into problem that I can't select any account (adminstor or my own account) since mouse didn't move at all. I also tried to restart by selecting last successful log-in, that attempt brought me back to the regular account selections screen. I don't think it is any hardware failure involved. Should I get a new USB cord mouse and keyboard to log in? would it work? Thanks.