Open your registry and find or create the key below.
Create or modify a DWORD value for Windows 2000 and XP or binary value for Windows 95, 98 and Me called "NoDriveTypeAutoRun". This value is an 8-bit number that specifies which drive types AutoRun is disabled on. Each bit represents a different drive type.
| Bit | Drive Types |
|---|
| 0 | Unknown drives |
|---|
| 1 | No root directory |
|---|
| 2 | Removable drives (Floppy, ZIP) |
|---|
| 3 | Hard disk drives |
|---|
| 4 | Network drives |
|---|
| 5 | CD-ROM drives |
|---|
| 6 | RAM disk drives |
|---|
| 7 | Reserved |
|---|
The default value is "149" (decimal) which is equal to "95" (hex) and "10010101" (binary). In binary this specifies that AutoRun should be disabled on Unknown (bit 0), Removable (bit 2), Network (bit 4) and Reserved (bit 7) drive types. (i.e. REG_DWORD: "0x00000095 (149)" or REG_BINARY: "95 00 00 00")
Therefore to disable AutoRun on CD-ROM drives as well you would set enable bit 5 so that the value becomes "10110101" (binary), "181" (decimal) or "B5" (hex). (i.e. REG_DWORD: "0x000000B5 (181)" or REG_BINARY: "B5 00 00 00")
To disable AutoRun on all drive types you would set this value to "11111111" (binary), "255" (decimal) or "FF" (hex). (i.e. REG_DWORD: "0x000000FF (255)" or REG_BINARY: "FF 00 00 00")
To enabled AutoRun on all drive types you would set this value to "10000000" (binary), "128" (decimal) or "80" (hex). Bit 7 is left enabled because it is reserved. (i.e. REG_DWORD: "0x00000080 (128)" or REG_BINARY: "80 00 00 00")
Restart Windows for the change to take effect.
