NoteHKCU\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer
| Data type | Range | Default value |
|---|---|---|
| REG_SZ | 0x0 - 0xFF | 0x95 |
Disables the Autoplay feature on all drives of the type specified.
Autoplay begins reading from a drive as soon as you insert media in the drive. As a result, the setup file of programs and the music on audio media starts immediately.
This entry stores the setting of the Disable Autoplay Group Policy. Group Policy adds this entry to the registry when you enable the Hide these specified drives in My Computer policy. If you disable the policy or set it to Not configured, Group Policy deletes the entry from the registry and the system behaves as though the value is 0x95.
This entry is a bitmapped value. To disable Autoplay on a particular type of drive, set the bit representing that drive type to 1. To disable more than one type of drive, set the bits representing each type to 1, or sum the hexadecimal values of the representative bits.
| Value | Meaning |
|---|---|
| 0x1 | Disables Autoplay on drives of unknown type. |
| 0x4 | Disables Autoplay on removable drives. |
| 0x8 | Disables Autoplay on fixed drives. |
| 0x10 | Disables Autoplay on network drives. |
| 0x20 | Disables Autoplay on CD-ROM drives. |
| 0x40 | Disables Autoplay on RAM disks. |
| 0x80 | Disables Autoplay on drives of unknown type. |
| 0xFF | Disables Autoplay on all types of drives. |
By default, Autoplay is disabled on removable drives, such as the floppy disk drive (but not the CD-ROM drive), and on network drives. The default value 0x95 (149) is the sum of 0x1, 0x81 (unknown types), 0x4 (floppy drives), and 0x10 (network drives).
To change the value of this entry, use Group Policy. This entry corresponds to the Disable Autoplay policy (User Configuration\Administrative Templates\System).
Note
Autoplay is triggered by a Media Change Notification (MCN) message from the CD-ROM driver. If the Windows 2000 interface does not receive this message, Autoplay does not operate, regardless of the value of this entry. Entries that suppress the MCN message, such as Autorun and AutorunAlwaysDisable also disable Autoplay.
Autoplay is disabled on any drive if it is disabled by the value of NoDriveAutoRun (in HKLM or HKCU) or NoDriveTypeAutoRun (in HKLM or HKCU).
However, if NoDriveAutoRun or NoDriveTypeAutoRun appear in HKEY_LOCAL_MACHINE, their corresponding entries in HKEY_CURRENT_USER are ignored.
You can use the Disable Autoplay Group Policy to add CD-ROM drives to the list of drive types already disabled (removable drives, network drives, and unknown drives) or to disable Autoplay on all drives. You must edit the registry to set any other value.
Tip
For detailed information about particular Group Policy settings, see the Group Policy Reference (Gp.chm) on the Windows 2000 Resource Kit companion CD.
For general information about Group Policy, see Group Policy in Windows 2000 Help.
To see a table associating policies with their corresponding registry entries, see the Group Policy Reference Table.
Related Entries
NoDriveAutoRun (in HKLM)
NoDriveAutoRun (in HKCU)
NoDriveTypeAutoRun (in HKLM)