To resolve this issue, please download and install the latest version of Alienware Command Center 5.5.14.0 from this link. If you already have AWCC installed, you should be able to just update to the latest version. 
There is an issue with Alienware Command Center latest release on Dell G15 5515 Ryzen Edition, the problem is specifically with the service Display001VcpSrv described as Alienware FXDisplay001 Components for AWCC, whenever the service is started the mouse cursor keeps displaying the "wait cursor". I don't know if it's taking up processing power or not but for the meantime I'm leaving the service stopped and disabled untill Dell patches it, in the case you're facing the same issue I recommend you do the same.
Alienware Command Center v5.5.9.0_A00 bug