2003 server, no desktop after login, COM+ and MS DTC errors

DT I have a production file server, 2003 enterprise 32 bit, that after login won't display the desktop, all you get is a blank blue screen with the mouse visible on it.  The same occurs if you remote desktop into it.  It is active on the network, pingable and its file shares are working.   If I bring up task manager with ctrl shift esc one svchost process is using 50% of the processes.  Running a new task via taskmanager such as cmd.exe, or any msc or anything else produces a prompt that say I need to set up an association for this file type through control panel options.

Remoting into the eventviewer I see errors with the com+ service, a 4610 complaining about service.cpp and suggesting I reinstall the Com+ event system.  Subsequent errors are a Volume Shadow Copy Service information error, followed by a MS DTC component critical error and terminating referencing cservice.cpp.

Should I reinstall the COM+ as the event view error message suggest or will this get me further into trouble?  I can't afford to rebuild this system as it will take days and for the moment it is functioning on the network.  What course of action do you suggest?

Bill