You do not have sufficient privileges

Hello all,

I've had this issue multiple times now, so I've come to the end of my tether! (i've had a search of the forum already and tried the suggested advice)

Running computers with Windows 7 x64.

All runs well for so long, then suddenly they start dropping like flies. They stop reporting their details/status etc to the management console, and when I try to manually access Sophos on the computer its installed on, I get the error:

"You do not have sufficient privileges to run the Sophos Endpoint Security and Control main application.

You are not a member of any of the Sophos groups.. blah blah.... Please contact your administrator."

I am the administrator!!! And I'm deffinately a member of the SophosAdministrator group.

I've checked the machine SID as previously suggested, and all's fine there, checked the groups, again all's fine. Also checked registry permissions for certain keys etc as suggested, all's fine there, and we don't run multiple domain controllers.

The only way I know of to fix this problem (that I've had to do now 4-5 times) is completey uninstall all Sophos products, then reprotect the machine from the console.

Anybody shed any light?!

Ben