> In the event log:
>
> The OMSCAN service failed to start...
>
> What service name does this belong to so I can set its
> status to 'Manual' within services.


OMSCAN appears to belong to the HP Open Mail server; is it possible you
installed something like that and somehow don't know it?


If it's not that, a guess would be (document) scanner software, such as
Omnipage, but again I'd expect you to know what you installed right before
this error started.