Hkey_Current_User\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer\NoDriveTypeAutoRun
Change 0x91 (145) to 0x95 (149)
Was 0x91 (+0x4 should disable on removable drives)
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Fuller details:
"For example, let's say you want to disable AutoRun for everything but CD-ROMs. To block the other media types, according to Microsoft's cryptic documentation, you'd add 1 for unknown media, 4 for removable drives (such as USB drives), 8 for fixed drives, 16 for network drives, 64 for RAM drives, and 128 for other drives of unknown types. Add all of those decimal values together and enter the result — 221 — in the Decimal box of the NoDriveTypeAutorun Registry key."
32 = disable autoplay on CD-Rom drives ( = 0x20 = DRIVE_CD_ROM)
The values in the bitfield correspond to return values of the GetDriveType function:
#define DRIVE_UNKNOWN 0
#define DRIVE_NO_ROOT_DIR 1
#define DRIVE_REMOVABLE 2
#define DRIVE_FIXED 3
#define DRIVE_REMOTE 4
#define DRIVE_CDROM 5
#define DRIVE_RAMDISK 6
7 = future use
