I found a forum that led me to this MS KB article;
http://support.microsoft.com/default.aspx/kb/307545
This worked for me, allowing me to start the OS again.
From there, I started checking which drivers needed reinstalled. In my
case, reloading the Nvidia Video and Audio drivers resolved most of the
outstanding issues. There are a couple of minor issues to resolve with
drivers, still, that are being reported in the Event Log.
The only other major issue for me is that the Acrobat Reader is at version
8, while the restore point still has this listed as 7.09. Add/Remove
Programs cannot remove Adobe 7.09 and the version 8 installer fails, saying
that the previous version needs to be uninstalled, first.
"Library Sysadmin" wrote:
> "Computerflyer" wrote:
>
> >
> > After the BIOS upgrade did you clear (reset) NVRAM? Sometimes a BIOS
> > upgrade has problems with existing cached information from earlier
> > levels and needs a reset.
> >
> > It sounds like you might want to first downgrade your BIOS to the
> > level when everything worked, see how it goes then, and leave it alone
> > if working - unless you had problems that a BIOS upgrade was "supposed
> > to fix".
> >
>
> Yes, I did reset the NVRAM after the BIOS upgrade.
> Yesterday, I did try to downgrade the BIOS, but the problems persist.
>
> I'm currently getting Stop Error 51 - Registry _Error during the repair
> attempts.
>
> Something else I wondered about - in either the Recovery Console or from the
> CD-ROM install disk, is there a way to use your restore points and reset the
> sytem back to one of those?
>
> TIA
> Rick