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In reference to this answer How do I hide the System Reserved partition?:

In some cases - as seen in this question - removing the drive letter for the System Reserved partition can cause other partitions on that drive to not show up in Windows Explorer. To avoid that, a registry tweak must be used to maintain the drive letter but hide the drive.

Open the Registry Editor (type regedit in the Run dialog) and navigate to HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer, creating the Explorer key if necessary. Create a new DWORD value called NoDrives. The data for that value should be a bitmask with set bits indicating a hidden drive. To hide only the A drive, set the data to 1. To hide the B drive, set the data to 2 in decimal (10 in binary) - the second bit corresponds to the B drive. Similarly, 9 would hide the D and A drives (it's 1001 in binary).

A logoff/logon cycle may be required for this change to take effect.

I have two drives, and two windows 7 boot ups and so I have 2 system reserve drives that I would like to hide. Is there a way to add a 2nd DWORD value for the 2nd drive ? the two drives in question are D and G.

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Tom Badaj
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1 Answers1

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I would like to hide two drives, D and G.

You don't need a 2nd DWORD as the way NoDrives works is a bitmask where the set bits indicate a hidden drive.

So in your case the value you need is 72.

72 decimal is 01001000 binary:

  • The 4th bit is set (D is drive "letter" 4)

  • The 7th bit is set (G is drive "letter" 7)

There is a calculator at NoDrives to make life easier:

enter image description here

Copy the result into the registry to hide the drive letter(s)

User Key:

[HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer]

System Key:

[HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer]

Value Name: NoDrives

Data Type: DWORD

After changing the registry, logoff or reboot so that it takes effect.

Drive mappings hidden with a nodrives registry setting are still available, just type the drive letter into the explorer address bar.

Source NoDrives

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