I have never heard of this cpes_clean.exe tool before, seems that this is quite an olde ZA removal tool from the google hits I saw.

I don’t know if you were using an up to date one, but you could try this site and see if they can offer some advice/tools.
Also see http://www.askvg.com/ultimate-collection-of-uninstallers-removal-tools-for-all-popular-anti-virus-software/ for others not listed above.
and http://uninstallers.blogspot.com/

The latter has quite a selection of up to date tools normally from the programs home site.