XP does not start and computer keeps rebooting

[torsten-e]

My computer keeps rebooting as soon a user loggs in, no matter which one. If
left alone the C reboots after a few minutes. There is no posibility
whatsoever to access.
I transferred the harddisc to another computer for a thorough virus scan,
but the problem remains though some virus where removed.
I suppose I got some sort of malvare. The problem i how to get rid of it.
Can anyone help?

 

[teaching50]

HI
go for first repair of OS using bootable CD.
If it not works try second repair, it recovers all the missing and corrupted
files. The will get resolve. If you already tried please let me know for
further steps

url:http://ureader.com/msg/12682565.aspx

I am having the same problem with one of our computers at school. It
attempts to start however, I cannot even get to the login screen. I have
tried to start it in safemode, safe mode with networking, safe mode with
command prompt. and start windows normally, and last know good configuration
but nothing happens. It is the same thing. It just attempts to start, then
shuts down and restarts. Any help would be appreciated.

Thanks.