I had installed version 15.5 and i had some issues with cinema 4d and i decided to uninstall the beta driver and install the stable one. To uninstall the driver i used amd cleanup utility, after that I restarted the pc and started installing the stable version but I've got this error "encountered an improper argument". After that I tried to install version 15.4.1 but I get the same error. I don't have any restore point saved. My gpu is R9 270x 4gb. Any help?