To install MSMQ controller servers (PEC, PSCs, or BSCs) you must have database administrative rights on both the computer on which you are installing MSMQ and the controller server above it. In other words, to install a PSC, you must have database administrative rights on the PEC, and to install a BSC, you must have database administrative rights on the PEC or PSC it is supporting.
By default, the local Administrators group has database administration rights on the computer.
Note If you add a user to the local Administrators group on a server, and that user is currently logged on (to another computer), that user must reboot his or her computer and log back on before he or she is granted administrative rights.