Arlen, I ran into the same issue and found two items that could cause this.
1. After shutting down MQSeries Services via the system tray icon, right click on the icon and select "Hide". This will stop the process that control the icon. 2. I found that I had to stop the virus scanning services also. IBM referred me to a couple of tools for identifying processes associated with open DLLs. Here is a link to the tools: http://www.sysinternals.com/ntw2k/utilities.shtml/ The utilities are: Handle ListDLLs Process Explorer They are very easy to use. Run handle and listdlls from DOS prompt and put results in file. Process explorer is a GUI. The listdlls utility helped me identify the virus scanning software as the source of the problem. Good luck! Regards, Bill Arlen Williams <arlen.williams@E To: [EMAIL PROTECTED] DS.COM> cc: Sent by: MQSeries Subject: AMQ4757 Error applying CSD01 to Windows 2000 V5.3 List <MQSERIES@AKH-Wie n.AC.AT> 02/04/2003 11:15 AM Please respond to MQSeries List I am trying to apply CSD01 - PTF U200181 to pair of Windows 2000 servers running IBM WebSphere MQ for Windows V5.3. The 2 servers are clustered using Microsoft Cluster Server (MSCS). After shutting down everything related to MQ that we can think of we get the following error during the install. IBM WebSphere MQ files are in use. Stop activity and retry. (AMQ4757) Does anyone have any ideas on what files are in use and by who? Arlen Williams Instructions for managing your mailing list subscription are provided in the Listserv General Users Guide available at http://www.lsoft.com Archive: http://vm.akh-wien.ac.at/MQSeries.archive Instructions for managing your mailing list subscription are provided in the Listserv General Users Guide available at http://www.lsoft.com Archive: http://vm.akh-wien.ac.at/MQSeries.archive