Is group policy causing this: USB hidden

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Hi,

I've got a strange problem. I have about 10 new Dell Optiplex GX620s in my domain. When a USB flash drive is plugged in, the OS recognizes it and assigns a drive letter, but you can't see it in My Computer or Windows Explorer. If you click on "Safely Remove Hardware" you can see the letter assigned. If you use a command prompt you can see the data in the device. If you open an application such as MS Word and do File/Open you can see the files on the device, but it's not visible in Windows Explorer. You can even see it in Device Manager and Disk Management.

I've tried this with a couple of different USB flash drives and the results are the same. I tried rebooting the computer with the device plugged in. When it reboots you can see the device in Windows Explorer, but if you remove it and reinsert it, you can't see it. I've tried changing the drive letter in Disk Management but that didn't help.

I removed one of the computers from the domain and that solved the problem. That's why I think it may be a policy. I looked at Resultant Set of Policies but don't see anything that I think could cause it. Other computers in the same domain don't have this problem, only the GX 620s. Dell says "reinstall" but I'm reluctant. Many of the computers have different software packages and it would take a long time to reinstall all of them.

Any ideas? My searches have come up empty.

Thanks!!
.

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