oops, looks like a bad key. There's more registry entries involved for changing prompt to ignore. This is what happens when prompt is changed to ignore from the System properties: HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Driver Signing Name: Policy Old: hex:01 Now: hex:00 HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Setup Name: PrivateHash Old: hex:2d,20,f1,68,6f,10,b7,0c,f3,f0,37,54,ec,b1,8c,79 Now: hex:3f,ac,90,40,51,a9,c7,e6,1c,b5,d5,9c,5d,db,fa,ea HKEY_USERS\S-1-5-21-2025429265-920026266-1957994488-1003\Software\Microsoft\Driver Signing Name: Policy Old: dword:00000001 Now: dword:00000000 If the S-1-5-21-2025429265-920026266-1957994488-1003 isn't identical to yours then you're out of luck, its randomly generated on every windows setup