Have this strange reboot loop issueon a XP Pro Desktop. Not sure if it is malware or what. At first when I powered on the PC, it would get just past the windows splash screen, the a box would pop up saying "lsass.exe operation failed" then when you click OK the PC reboots. When I try to boot to safe mode there it starts to load the drivers, then there is a short pause and a reboot. I have also tried to boot using the Last Known Good Configuration option.
I took an XP CD, booted into recovery console and ran CHKDSK /r. I made some a litlle progress from this, now when I boot I get to the login screen enter username and password, now it goes as far as showing the desktop background ((no icons or anything els)) then it just reboots.
If I leave the login screen alone without doing anything the default windows screen saver will appear for about 1 second then go right back to the login screen. I've begun to wonder if this is a malicious script hiding somewhere or a corrupted registry. I've also tried holding down the SHIFT key durring the boot process because this supposedly bypasses the startup items, but this did not help. Iwould try a repair intall but that is not an option as it is an ACER computer and the recover disk will do nothing but wipe the disk and install from a factory image.
Not sure what my options are here, hope someone can help.