New
#11
It is enabled. Been enabled since I built the PC, but this problem just cropped up recently.
How to delete "Unknown Disk 3"
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New #12
I had a similar sort of problem occur, it's a bit of a long read but it's here. Strange USB Drive Showing in Device Manager
Switching Legacy USN to Auto solved it for me. It's worth a shot.
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New #14
OK, again a shot in dark. But no harm in trying. Do a drive cleanup
Download v 0.8.1 of the drivecleanup.zip from Drive Tools for Windows.
Unzip it to a folder, say drivecleanup.
You will have two folders Win32 and x64 each containing DriveCleanup.exe for 32 bit and 64 bit respectively.
Remove all USB storage devices from your system (except your Keyboard and mouse) and reboot.
Right click on the DriveCleanup.exe and run as administrator. (Use the DriveCleanup.exe file appropriate for your bit version of Windows.).
After the clean up act, reboot and check whether your system is still showing the non-existent drive.
( When you plug in your USB devices after this cleanup these will be installed afresh. What you have done is to remove all non-present devices and drive letters, Registry entries associated with them and start with a clean slate. Hopefully that should resolve the problem.)
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New #15
Open Device Manager. Click View->Device by Connection. Expand ACPI devices till you get to PCI bus. Then expand everything under PCI bus.Can you find the disk in Dev Mgr when viewing by connection? what's it connected to? To start, try to see if it's a disk with a PCI, USB or virtual bus connection.
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New #16
Drive cleanup did not fix it. And nothing showing in Device Manager. The device is not present so nothing to show.
I also did a Registry search for "Disk 3" and didn't come up with anything.
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New #17
Amazing! I right clicked on the Disk 3 entry and then clicked Properties. I clicked Uninstall driver and now its gone!
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New #18
Brilliant, I just had a look at Disk Management and noticed I had a Disk 3 that certainly wasn't present, it claimed it was a USB drive. Followed what you did and it's gone. Top stuff!
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New #19
Sadly, when I rebooted it came back.
There's nothing connected that could be considered (or Windows thinks) its a USB drive. I have an external USB 3.0 drive but its properly recognized when I connect it. I have my recording studio peripherals (a Behringer BCF2000 and a Roland Studio-Capture and a Frontier Tranzport wireless controller) but they are powered off or disconnected in the case of the Tranzport. I have USB transceivers for a Microsoft wireless keyboard and a Logitech wireless mouse and an iLok USB key which shows up as a "dongle" in the Device Manager. I have a bank of 5 USB connected CD/DVD burners, that are powered off, but when powered on show up correctly.
As both Win 7 and Win 8.1 (dual boot) show the same things, it sort of goes back to the motherboard/BIOS (?). It has only been showing up for a month or so that I recall. I don't remember having it before. I have upgraded SSD's but they are SATA connected, not USB and the drives show up properly. The BIOS has not been upgraded (the last BIOS update for the motherboard was 2012).
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New #20
I disabled the device and now its not showing in the Disk Management panel. But that is not really a fix.
I'll have to let it go for a while. I have to setup for a recording session coming up at 11 AM (eastern).
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