4.1.0 HP PolyServe Software for Microsoft SQL Server administration guide (T5392-96074, October 2010)

3. Right-click Lsa, point to New, and then click DWORD Value.
4. Type DisableLoopbackCheck, and then press ENTER.
5. Right-click DisableLoopbackCheck, and then click Modify.
6. In the Value data box, type 1and then click OK.
7. Exit Registry Editor.
8. Restart the computer for the change to take effect.
NOTE:
When Matrix Server is installed, it can create the appropriate registry key
automatically if desired.
Error when creating a Virtual SQL Server
Because the installation of MSCS (Microsoft Cluster Services) modifies key system
files, you must completely remove MSCS before creating a Virtual SQL Server. If you
do not uninstall MSCS, you will see the following error when adding a Virtual SQL
Server:
See the following Microsoft Knowledge Base article for more information about
removing MSCS.
http://support.microsoft.com/kb/282227
Failure to virtualize a SQL instance
If a SQL instance has the service account set to a local user or administrator, an
attempt to virtualize the instance will fail with this message from the operating system:
A member could not be added to or removed from the local
group because the member does not exist
Troubleshooting140