For some reason I couldn’t login to RDP of a Virtuozzo CT/VE so I had to go in via the VZ hardware node.
URL: http://www.tech-recipes.com/rx/446/xp_kill_windows_process_command_line_taskkill
tasklist
Listed all the tasks. It appears that EXCEL.EXE had 100s of processes running so I needed to kill them. I tried:
 taskkill /IM EXCEL.EXE
But, it warned me that it needed to be forcefully terminated.
 taskkill /F /IM EXCEL.EXE
Did the trick.  I could have also killed individual processes with:
taskkill /PID PROCESS_NUMBER