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Does anyone know what "\?\Volume...." is or why it would be listed as a disk on the windows defragmenter?




It is not listed on other defragmenters like defraggler.

The E: and F: drives are mirrors.

Listing for HKEY_LOCAL_MACHINE\SYSTEM\MountedDevices\ . There were many other entries with similar naming but they were removed after using the application suggested by Psycogeek.


I removed the keys as Psycogeek suggested but they repopulated as a different alphanumeric string labelled as "Never run"


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Only other thing listed is the small Windows 7 system partition. –  Arctor Oct 2 '11 at 16:48
Nothing shows up.. from what I remember it has pretty much been there since a clean install. On top of that I am ridiculously careful about controlling what gets installed on my system. Almost everything runs virtualized and I am using Bitlocker with a TPM which was activated before I even used the system and the TPM has never been triggered. –  Arctor Oct 2 '11 at 17:55
It doesn't show up on the drive but it is listed in the registry under.. HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\MountPoints‌​2\CPC\Volume\{e4c9fcfe-d20f-11e0-93fa-806e6f6e6963} , HKEY_LOCAL_MACHINE\Microsoft\Dfrg\Statistics\Volume{e4c9fcfe-d20f-11e0-93fa-806e‌​6f6e6963} , HKEY_LOCAL_MACHINE\SYSTEM\MountedDevices\ and HKEY_USERS\S-1-5-21-199.......\Software\Microsoft\Windows\CurrentVersion\Explore‌​r\MountPoints2\CPC\Volume\{e4c9fcfe-d20f-11e0-93fa-806e6f6e6963} –  Arctor Oct 2 '11 at 19:19
I assume that if I delete the key listed under HKEY_LOCAL_MACHINE\SYSTEM\MountedDevices\ which has the exact same name and reboot it will disappear... would still like an explanation of why it would show up under defragmenter like it does. –  Arctor Oct 2 '11 at 19:42
It could be a USB device or a any other volume that has been mounted by Windows, or malware created it, not sure if it is safe to delete or not. –  Moab Oct 3 '11 at 2:22

4 Answers 4

up vote 3 down vote accepted


USB devices that have been attached, appears safe to be removed, see more information link below.


More Information


I also found this response

thats were the boot loader goes, its so u can encrypt the whole partition but that is unencrypted so the boot loader can that then get to the windows boot in the partition since the loader in the 100MB can pull the key from your TPM chip and u can use the encrypted drive.

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I do have a TPM active.. guess that's what is making it show up in the defragmenter. –  Arctor Oct 3 '11 at 4:32

http://www.uwe-sieber.de/drivetools_e.html#drivecleanup find the Drivecleanup here. then run it with the -T option, that will show you what it thinks is orphaned. Might be a safer way of removal. (as long as the programmer knew what he was doing :-)

after all the discussion , I was wondering if it was a "virtual" drive that was once mounted, or a USB booting, where the USB was enabled for booting in the bios.

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I ran the program and it removed records of a large number of devices including the one listed but the volume is not only still listed under the windows defragmenter but it is also still listed under HKEY_LOCAL_MACHINE\SYSTEM\MountedDevices\ ... there were like 30 entries under this with similar names but the application removed them and left it alone along with one other similar key. –  Arctor Oct 2 '11 at 20:36
dang, that leaves chuck it and reboot and see if it comes back. i have not got that far with win7, but none of the locations you point it at are critial, it is not in my system, and it was not in the microsofts MVP system when he showed his. –  Psycogeek Oct 2 '11 at 20:47
Listing for HKEY_LOCAL_MACHINE\SYSTEM\MountedDevices** **This looks very bad to remove those , from that location. Ohh crud, i think you could lose boot. –  Psycogeek Oct 2 '11 at 21:13
I deleted all the registry keys that had the string in it and rebooted.. but the keys were repopulated with a different string and the entry is still listed under the defragmenter. I edited the OP with a screenshot. –  Arctor Oct 2 '11 at 21:24
lol bit late on telling me not to remove it –  Arctor Oct 2 '11 at 21:25

Try clicking Start, then type cmd then choose Run as Administrator.

Type vssadmin delete shadows /all then click ENTER. It should remove shadow copies.

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The author solved this question 4 years ago. You might want to provide more information on the command itself. –  Ramhound Jun 10 at 12:35

It's the un-named 300MB partition without a drive letter on disk 0. It's displayed as its volume GUID because it doesn't have a name or drive letter to display instead. On most stock installs this would be labelled "System Reserved".

Certain programs (such as R-Studio) will happily list the GUIDs of every volume, partition, and drive graphically should anyone else be confused by hidden boot partitions in future.

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