Here's a reg file, it disables it everywhere you can:
[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Class\{4d36e968-e325-11ce-bfc1-08002be10318}\0001]
"ACUserPreferencePolicy"=dword:09020000
"DCUserPreferencePolicy"=dword:09020000
"DisplayFeatureControl"=dword:000003e3
"Dpst6_3ApplyExtraDimming"=dword:00000000
"FeatureTestControl"=dword:0000cff0
"PowerAcPolicy"=dword:c1bac1ba
"PowerDcPolicy"=dword:c9bac0b8
"PowerDpstAggressivenessLevel"=dword:00000001
"PowerGpsAggressivenessLevel"=dword:00000001
"PowerPlanAwareFeatureSettings"=hex:ff,ff,00,00,00,00,00,00,00,00,00,00,00,00,02,01,02,00,00,00,02,01,02,00,02,01,02,01,02,00,02,01,02,01,02,00,02,01,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,06,00,00,00,04,00,00,00,00,01,00,00,06,00,00,00,04,00,00,00,00,01,00,00,06,00,00,00,01,00,00,00,00,01,00,00,06,00,00,00,04,00,00,00,00,01,00,00,06,00,00,00,04,00,00,00,00,01,00,00,06,00,00,00,04,00,00,00,00,01,00,00,06,00,00,00,04,00,00,00,00,01,00,00,06,00,00,00,04,00,00,00,00,01,00,00,06,00,00,00,04,00,00,00,00,01,00,00,06,00,00,00,04,00,00,00,00,01,00,00,06,00,00,00,04,00,00,00,00,01,00,00,06,00,00,00,04,00,00,00,00,01,00,00