If anyone has any ideas, they are more than welcome :)
I tried to install Etherlords and got the following message:

We are sorry, installation failed...
An error occurred while trying to rename a file in the destination directory:
~\Etherlords\Etherlords.exe
MoveFile failed; code 2.
The system cannot find the file specified.

EDIT:
Ok after disabling UAC and my Antivirus and running as administrator, I managed to isntall it...