Latest version of DCOM is 1.3:

http://www.microsoft.com/com/resources/downloads.asp

The latest version of WMI is 1.5:

http://www.microsoft.com/downloads/details.aspx?familyid=afe41f46-e213-4cbf-9c5b-fbf236e0e875&languageid=f49e8428-7071-4979-8a67-3cffcb0c2524&displaylang=en

To inventory:

DCOM = DCOMEXT.DLL             WMI = WMI.DLL

For Windows 9x and Me clients, you can check the following registry key:

HKEY_CLASSES_ROOT\CLSID\{bdc67890-4fc0-11d0-a805-00aa006d2ea4}\InstalledVersion

If DCOM is installed on the system, the default value of the registry key will contain the version of DCOM installed on the system which is stored in the "a,b,c,d" format:

• a - major operating system version
• b - minor operating system version
• c - minor file version
• d - major file version

This information is an extract from 275259 "SMS: Information on Identifying the Version of DCOM on a Window 95, Windows 98, or Windows Me Computer".