Avast! Free Hanging on MSMPENG during first Initial Full System Scan

Newly installed Avast! Free. Ran full scan and it has been an hour and counting on my Windows XP system and Avast! hasn’t gotten past C:\Program Files\Microsoft Security Client\MsMpEng.exe. Infected? Normal? Thanks for your thoughts.

CPU time is being taken by AvastUI and Unsecapp, so SOMETHING seems to be happening, but I don’t know what. Perhaps the scanned file list isn’t being updated and it is running normally in the background?

Tags:Frozen, hung, hangs, frozen, stopped

C:\Program Files\Microsoft Security Client\MsMpEng.exe.
Well you have MSE or windows defender installed

https://blog.avast.com/2014/05/09/when-software-collides-what-to-do-with-your-old-antivirus-program/
http://blog.kaspersky.com/multiple-antivirus-programs-bad-idea/

How to remove http://www.avast.com/faq.php?article=AVKB11#artTitle