srshet

I am unable to create partition/assign drive letter for disk drive. Up on checking the registry "HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Class\{71A27CDD-812A-11D0-BEC7-08002BE2092F}" the subkeys number reached maximum limit i.e 9999. ( http://www.microsoft.com/technet/prodtechn...7.mspx?mfr=true ) at the same time, if I delete a subkey from then list, I am able to create/mount the volume. looks like, Windows keeps the subkeys of volumes which is no longer valid ( disks were initially presented to the host and later removed) is this a microsoft limitation? is there any workaround to remove all the invalid references so that operation succeeds