I am recieving that error when attempting to install a fresh copy of TFS Workgroup. Here is the part of the Msi Log that is erroring:

TfsGSSInit - Irrecoverable error: TF50237: An error occurred when adding a group member. The group with security identifier (SID) S-1-9-1551374245-1204400969-2402986413-2179408616-0-0-0-0-4 does not exist.
10/09/06 13:52:26 DDSet_Status: Process returned 6130
10/09/06 13:52:26 DDSet_Status: Found the matching error code for return value '6130' and it is: '28002'
10/09/06 13:52:26 DDSet_Error: 6130
MSI (s) (3C!AC) [13:52:51:332]: Product: Microsoft Visual Studio 2005 Team Foundation Server - ENU -- Error 28002.Error unknown.

Any ideas?

As part of a workgroup install, TFS (specifically that TfsGssInit utility) attempts to create a group called "LicensedUsers" (with that SID) and then add you (whoever is doing the install) to it. Unfortunately, if there are any problems creating this group, the V1 code assumes the problem was with the group already existing (unfortunately it doesn't log the error that happens) and moves on to attempt to add a member to the group (hence the error you're seeing).

A little further up in the log should show how TfsGssInit was called (the full command line). Can you paste that? Can you try it yourself?

What user did you run the install as? Assuming it was a member of the Administrators group (was it a domain user?), you may want to try a different admin account as a data point.

Also, if you can, please send the *full* log files to me (james.manning@) since that should include the full output from tfsgssinit, which should help a bit.

Thanks.