USB flash drive disappearing and reappearing

By Enforcer Drive ·
My flash drive used to work fine, until one day I put my drive on another computer and formatted it. When I put my flash drive back on my computer it detects the drive then loses it, detects and loses it etc. An interesting point is that any other flash drive works fine in this computer and my flash drive works fine in any other. I'm almost sure this can be fixed by a registry tweak but I dont know which key controls USB detection. Operating system is Windows XP Pro. So, who is the legend that knows this fix?

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Try this

by Jacky Howe In reply to USB flash drive disappear ...

With the external drive attached to a system that will regognise it, press the WinKey + Pause/Break and click the System Restore tab. Stop monitoring the drive and the system volume information directory should be removed.

* Try it in a rear port

The front ports, are connected to a fly lead, and may not be supplied the correct watts of power. Where the rear ports, are integrated into the motherboard, and should have a constant supply of 2.5 watts, of power.

Edit: *

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by Enforcer Drive In reply to Try this

Thanks, but it appears flash drives dont show up as drives under system restore, also I have tried it in rear ports.

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Plan B

by Jacky Howe In reply to reply

Write down all fixed Disk and CD/DVD drive letters so as not to delete them. DO NOT delete any of the fixed hard disk drives or CD/DVD optical drives registry values.

1. Login with Administrative privileges.

2. Disconnect all USB or FireWire storage devices.

3. Open Registry Editor by typing regedt32 in the Run box and navigate to the following registry key: HKEY_LOCAL_MACHINE\SYSTEM\MountedDevices. Right click on MountedDevices and select Export. Save this file as you may need it in case something goes wrong. Save it as Devices.reg, it should default to My Documents.

4. Under HKEY_LOCAL_MACHINE\SYSTEM\MountedDevices there will be registry keys with the name that resembles the format of \DosDevice\X: where X can be any alphabet letter which corresponding to your physical system drive letter.

5. Delete all possible USB drives, FireWire drives and external drives which have a drive letter.

<b>DO NOT delete any of the fixed Hard Disk Drives or CD/DVD optical drives registry values.</b>

Exclude \DosDevice\A: which normally reserved for floppy disk drives.

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No Luck

by Enforcer Drive In reply to Plan B

Thanks again, I tried this and it re-mapped my card reader drives, but I am still getting the disapearing and reapearing usb drive. Is there any other registry fields that could affect this? Another special note, I just noticed my root drive is mapped to G.

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You didn't delete

by Jacky Howe In reply to No Luck

the fixed drive did you?

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For the above

by Jacky Howe In reply to You didn't delete

If you did you can do a System Restore to an earlier time.

It is good practice to backup the Registry Key that you are modifying in case something goes wrong. If you did back up the Key add it back to the Registry.

Here is another Registry mod to try.

Why doesn't my computer detect my new USB device when I'm running Windows XP or Windows Server 2003?


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by Enforcer Drive In reply to For the above

Fixed problem with system restore, thanks for your knowledge.

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Glad I could help [NT]

by Jacky Howe In reply to For the above

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