how to disable auto reboot on system failure

[OR]

Win XP auto reboots repeatedly. The rebooting loop started after power
failure at power company and takes place every time I switch on the box.
Boot sequence gets as far as Post when it reboots. Can't access Windows
Advanced Options Menu to disable Auto reboot. Can't see any error messages
due to this. Is there a way of editing the registry in order to disable this
feature without logging on to windows? Recovery Console perhaps?

 

[Pegasus \(MVP\)]

Win XP auto reboots repeatedly. The rebooting loop started after power
failure at power company and takes place every time I switch on the box.
Boot sequence gets as far as Post when it reboots. Can't access Windows
Advanced Options Menu to disable Auto reboot. Can't see any error messages
due to this. Is there a way of editing the registry in order to disable
this feature without logging on to windows? Recovery Console perhaps?

Building on Fazal's reply, here are two methods to edit the registry
in off-line mode:
- Temporarily connect the disk as a slave disk to some other
WinXP PC, then use regedit.exe to edit the System hive of
the problem installation.
- Boot the machine with a Bart PE boot CD, then do the same as above.

 

[OR]

- Temporarily connect the disk as a slave disk to some other
WinXP PC, then use regedit.exe to edit the System hive of
the problem installation.

Slave disk on the same IDE controller or on a different controller? Won't
that crash the PC? Are you sure the PC won't try to load the mucked up OS
on the slave disk? This happened to me once when I installed an old
diskdrive with a dual boot system as a second diskdrive. Not sure whether I
connected it as a slave though. The PC got inoperable and I had to reinstall
Windows.

 

[Pegasus \(MVP\)]

Slave disk on the same IDE controller or on a different controller? Won't
that crash the PC? Are you sure the PC won't try to load the mucked up OS
on the slave disk? This happened to me once when I installed an old
diskdrive with a dual boot system as a second diskdrive. Not sure whether
I connected it as a slave though. The PC got inoperable and I had to
reinstall Windows.

No, it won't crash the PC and no, the PC won't boot off the slave disk.
Just make sure to connect the problem disk as a slave disk.