This error indicates that there is a problem with the main system registry file. The solution is to replace this file with a backup that has been stored as part of a System Restore point on your machine. The quickest way to recover is to create a free
Hirens Boot CD (on another machine) and boot your computer from this CD. Note that you must use the "Burn Image" feature of a CD burning program to properly make this CD. The download site for this CD and the instructions to burn the CD are at the following
After you boot from this CD (may need to change BIOS boot order), select "Mini Windows XP" and wait for a versions of Windows to come up. After that, go to the Hirens Boot CD Menu (HBCD Menu), select "Registry", then select "Registry Restore Wizard". Run
the Restore Wizard, choosing the backup date just before your problem. After it completes, shutdown your computer, remove the CD, and reboot your computer.
After recovering, perform a "System Restore" operation using the same restore point as with the registry restore wizard to assure system coherency:
Almost always, problems like this are accompanied by, if not caused by, File System corruption. You would also be well advised to perform a disk check (chkdsk) operation with the "/R" (repair) option when convenient. Note that this will be performed at next
boot, runs before Windows fully loads, can't be interrupted, and can take upwards of a couple of hours to perform. Backing up important files before performing this is also recommended.