MSMQ cannot delete or purge a queue

I think there is rights issue. You are not able to give rights then do following step for forcefully delete queue. Stop following services Message Queuing Triggers, Net.Msmq Listener Adapter Message Queuing. Go to C:\Windows\System32\msmq\storage\lqs Now open file in notepad or notepad++ and see the name of queue at QueueName=\private$\YourQueueName Before delete file backup the file. Now delete that file. Don't delete other file which does not have your queue name. Do these things as your own risk. Now start following services Message Queuing Triggers, Net.Msmq Listener Adapter Message Queuing. This trick work for me...