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Disabling Drive Letters

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4 replies

by sprocket

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I know the regedit "NoDrives" for hidding drive letters in explorer, but they are only hidden and you can still access them if you type in the drive.
What is the reg edit to disable specific drive letters so they cannot be accessed, ie so users can only access local drives C:\ D:\ and a few network ones f:\ s:\ and prevents them from using usb keys etc.

4 replies

by sprocket

But this only allows restriction on specific set options: A, B C, D or All. I cant see how you can add your own selections.
I want access for C: D: F: P: S: Z: and nothing else.

by mrjay67

I had this exact issue (except for the USB) and this is what I found(sounds like you did too):

Microsoft site info:
http://support.microsoft.com/default.aspx?scid=kb;en-us;242092

after looking at that info you can use this site to calculate the numbers correctly:
http://www.ronshardwebapps.com/Numbers.asp#marker

Use this value in the same spot for "NoDrives" in the registry to Actually RESRICT access:
"NoViewOnDrive"

Uses the same values as NoDrives.

NoDrives only hides the drives in explorer windows. NoViewOnDrive will keep them from accessing the drives. Applications and such should still use them normally.

I dont have anything that is specific to USB drives but restricting access to all but the letters you want should work.

hth
Jason CNA

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