You say you use xP Virus Total and Malwarebytes but never said if you have added cnconline.exe and ifeo.exe to the global exclusions. and you seemed to bypass this area
check program Files\Revora\CNCOnline and make sure those files.. cnconline and ifeo.exe are there..if not its most likely your anti virus programs blocking them or other files the launcher is trying to execute. before you re-install either watch wot xP Virus Total and Malwarebytes are doing as you install or disable these programs then try to install cnconline..nothing to lose if your looking at a reinstall anyway..hope this gets sorted..