You can remove all installed MSMQ components by running Setup. When you remove a PEC, all enterprise settings, including all the computers and queues within the enterprise, are deleted. When you remove a PSC, all site settings, including all the computers and queues within the site, are deleted. If the computer you remove is being used as an InRS or OutRS, it is deleted from InRS and OutRS lists of all independent clients using that server. When you remove MSMQ from any computer, Setup also removes all of the computer's queues in the MQIS and all local private queues from the local computer.
If a computer has failed and you cannot remove it using Setup, use MSMQ Explorer to delete the computer.
You must close all MSMQ-based applications before removing MSMQ.
Note If you installed the limited version of SQL Server 6.5, MSMQ Setup does not remove it when you remove MSMQ. To remove the limited version of SQL Server 6.5, run SQL Server Setup.