Norton Doesn't Start After MRU Install/Clean-Up

Just installed MRU Blaster yesterday on my W2K box, set up schedule to run every 15 hours, and also ran an initial scan and clean up. Since then, none of my Symantec utilities will run. The necessary processes are running, as indicated in Task Manager, but when I attempt to open Systemworks 2002, NAV, or any other utilities associated with the suite, nothing happens. No other programs seem to be affected so far. At any rate, I uninstalled MRU Blaster, but with no positive effect on the Symantec apps. Before going through the arduous process of cleanly uninstalling and then reinstalling Systemworks, does anyone have any suggestions related to MRU Blaster itself?

Thanks,
Chuck