My comodo anti-virus scheduled scan froze my computer

Yesterday, I woke up at night because my it was too light so I found out my computer was still on. I tried stop the scheduled scan of my comodo anti-virus but it was stuck at scanning kbduzb.exe. The scan had already been running for two hours. I gave up trying to shut-it-down through windows and just did a hard shut-down by holding the power button on my PC. Why couldn’t my comodo anti-virus scheduled scan finish?

HP A1520n
Windows XP media centre edition 2005 SP2

The stalling is probably caused by the crash of the Comodo Internet Security Helper service. Starting the service may help to temporarily solve it. Go to Control Panel → Administrative Tools → Services and start the mentioned service.

Does that fix it for the moment?