I know perhaps this is not your exact situation, but I just ran into
the same error. I had just loaded XP SP2 and joined my domain. The
domain controller is a Server 2003 system with heavy domain policies
set. I was getting that exact error whenever I tried to access my Disk
Management. Nothing helped I found online. Since I had the luxury of
"unjoining" the domain I did so. When I returned to a local WORKGROUP,
my Disk Management worked just fine. About that time that annoying
Firewall stuff from the Tray started popping up. So I disabled the
Firewall completely and unchecked all those Notify Me boxes. (We are
already behind a Cisco PIX and have all kind of other security measures
in place anyway.) Lastly, I rejoined the Domain, rebooted, logged in
as the Domain Admin and now the Disk Management is working fine. After
I booted up again in the Domain I ran "firewall.cpl" to see if it was
still off. Sure enought it was.
I am not sure which thing I did fixed it i.e. disjoining and rejoining
or cutting off the firewall prior to rejoining.
Go Figure.