Lsass.exe error on startup

hi, switched on PC at work this morning and the Lsass.exe error about updating a password came up. It's stuck in a continuous boot now and can't get into safemode without same error coming up.
I think it is my fault as I run some window Boot Disk cause PC was having blue screen now and then, it suggested it recovering regisitry so I did that last night and switched off ready to restart a fresh this morning.
Can it be fixed?
there is no XP disk, just the restore partition. I would prefer to repair the installation if poss. I do have an XP SP3 disk and the system OS is SP3 also, could I do a repair installation from that?

other options?
create new partition on C and install OS then try to get the software hive over to that? would it work?

Dell system XP SP3

any help is greatly appreciated on this..

http://kilsally.wordpress.com/2010/0...ng-windows-xp/

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Originally Posted by Pegasus

http://kilsally.wordpress.com/2010/0...ng-windows-xp/

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thanks for the help :)
I cannot get the XP Cd to go into recovery console tho? press R when Welcome to Setup comes up but nothing?..

well fixed it..lol.. got ubcd4win and did a registry restore and back to life..lol..