Regedit to hide CD-ROM and USB

April 8, 2005 at 23:16:58
Specs: Win 98, 512

How can i change some registery setting to stop user viewing the CD drive so that the can not us it or even let me know that how can i stop ppl from using CD rom and Usb drives

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April 9, 2005 at 03:12:47

You can certainly do what you want - see here but it can be tricky to get it right unless you know a little HEX.

The value for all 26 drive letters visible is "03ffffff" in HEX, where the last "f" signifies drives D through A. To just hide drive D, the value would be "03fffff7".

If you want to proceed, but can't get the value right, post back and let us know which drive letters you want to hide.

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April 9, 2005 at 06:10:33

I don't know how you'll prevent access to the USB but the CD-ROM is easy enough, just unplug it (the power and IDE cable).

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April 10, 2005 at 08:03:28

You can go into local security policy in Admin tools & set the cd-rom acess (cannot access cd-rom locally), but i dunno about the usb

Heres another way of hiding the drives in my computer

User Key:

System Key:


Key: NoDrives


The "NoDrives" value uses a 32-bit word to define local and network drive visibility for each logical drive in the computer. The lower 26 bits of the 32-bit word correspond to drive letters A through Z. Drives are visible when set to 0 and hidden when set to 1.

If your not happy working in Hex, add these decimal numbers to hide the drive(s):

A: 1, B: 2, C: 4, D: 8, E: 16, F: 32, G: 64, H: 128, I: 256, J: 512, K: 1024, L: 2048, M: 4096, N: 8192, O: 16384, P: 32768, Q: 65536, R: 131072, S: 262144, T: 524288, U: 1048576, V: 2097152, W: 4194304, X: 8388608, Y: 16777216, Z: 33554432, ALL: 67108863

For example to hide drive A and drive D, you would add 1 (A) + 8 (D) which means the value should be set to "9".

To disable all the drives set the value to "67108863".

Charles Anderson

228 London Road
Marks Tey

Tel: 44 01206 211666
Fax: 44 01206 212363

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