Hi Marc, I checked the event logs and could not find anything related to WPC, so what I did was to reset the UAC and the problem was fixed !
Let me explain further:
Since I tried almost everything possible, then I decided to mess with the UAC, it was disabled, so what I did was enable it again, apply the changes, reboot, disable it again and reboot, and the issue was fixed. It seems that UAC was not properly set.
Hope this help others with the same issue
My best regards