Can't use any network sharing service after changing CPU

>I changed out my CPU and now I get error messages whenever I try to access
>or
> play media on Vista 64. Also can't use my Pinnacle HD stick 800e in Media
> Center and can not access my Zune software at all.
>
> I understand that this is a DRM related problem. When I switched out the
> CPU, Vista apparently lost track of who I was and will not allow me to
> configure network sharing, or media sharing. Chip board and hardware
> config
> all rated for Vista and running on default settings.
>
> Here are some of the yummy error messages:
>
> Windows media player network sharing service has stopped.
>
> I go into Services.msc, set it to manual, automatic, automatic with
> delayed
> start, make sure service is running. No difference. System will not let me
> in.
>
> Zune just crashes. Won't start.
>
> Media center is fine until it senses the Pinnacle stick. Pinnacle stick is
> running on signed drivers - everything is running on signed drivers.
>
> I am the admin on this box.
>
> Everything else is fine - just the stuff that relates to media sharing is
> naffed. I have windows live one care running, no problems. I back all my
> stuff up with Carbonite, too. I have been able to find no solution in M$
> lit,
> and concierge is not able to help. From independent research online, other
> people who have received this message have been able to locate the
> microsoft/drm/cache file and clean it out. This apparently enables the
> other
> services to fire. I am unable to find the DRM folder in this version of
> Vista
> (Home Premium 64).
>
> In addition, If I close the 'Windows media player network sharing service'
> error message after boot, it keeps poping up again about once every thirty
> seconds.
>
> This is a sincerely annoying damn problem.
>
> How do I fix this without reinstalling Vista?
>
>