http://patch.warrock.net/k2network/warrock/updater.zip
1. Open the folder where you have the downloaded updater.zip and open the WarRock folder.
2. Run the WRLauncher.exe
3. While it is downloading updater.zip, quickly copy paste the downloaded updater.zip to the WarRock foulder and watch it supposedly download the file (which is already fully downloaded) and display "Complete!" in the launcher.
It should work