Isn't there a "Registry Restore" command that you can use to restore the previous version of registry? I thought that it was contained in the Win 2000 operating system, but it might be an aftermarket software program.
I use Norton Antivirus and I try to keep the restore disk up to date. It saved me a lot of trouble when my system was infected with KLEZ32.
No. Registry restore is built into WinME and WinXP, but not Win 2000.