I had the same issue . Apparently the drivers are NOT actually being installed by the software . You need to go to the software folder in /Program Files(x86)/Steelseries/World of Warcraft MMO Gaming Mouse/Driver7x64 folder and run the program DPInst.exe to actually install the correct drivers . Once I did this I had full functionality of the mouse , including the colors and lights settings .
I would still change the compatibility settings to Run as Administrator though , and changed security settings on all 3 of the mouse programs to allow full access to all users .
WoWMGui.exe - WoWMHid.exe and WoWMTray.exe