my pc just stopped working. i have xp pro OS, goback 4. after rebooting and i can see our three logon username and clicked on my username, the window stops at the window logo and freezez. i did try on safe mode but after logging in it logs you off right away. did goback 12 hours ago which was working alright before and still it does not want me to log on. logs-in then logs-out right away. it shows that i am logging in a network neighborhood but in any case why does it log me out right away? pls help. thanks.