"Eric" <Eric@discussions.microsoft.com> wrote in message
news:A17C20C0-1274-44E3-99EE-6E06D7C2F7AE@microsoft.com...
> Does anyone know whay "Set partition to active" is about under Disk
> Management?
> I accidently select this option for [D: drive], hopefully, it does not
> cause
> any damage so far. I would like to know what this option is about and how
> to
> disable this option.
> Does anyone have any suggestions?
> Thanks in advance for any suggestions
> Eric

When you turn on your PC, the BIOS looks for the
partition marked "active". It will then execute the code
stored in the Master Boot Record (MBR) of this active
partition. If you mark the partition containing drive D:
as active then the machine will probably not boot up.