Hello, I'm in the same way. Same configuration and impossible to erase complitely EWA from computer.
1/ first step: try to remove EWA from uninstall Windows program. impossible, also remove all manually from C:\.
use a clean registry, reboot and try to reinstall EWA, message failure appear in a window "..need use EWA Admin Tool for uptodate EPC and WIS and the program" (apologize due to translate in english).
Program uptodate through "setup.exe" is not possible"
2/ second step: because not see before, use the dvd 1of1_b1 and go to C:\ ewa \ tools / CleanEWAInstallation.
use a clean registry, reboot and try to reinstall EWA, message failure appear in window "......" (same as before)
no more idea to clean it.
it's like the program is in the box but I can't reach it because of erasing all access.
How do i completly remove all files for EWA net, EPC and WIS database from my computer? including registry entries etc..
Thanks in advance for your help.