USB Thumb Drive Problem - Code 38 in Win 7 Pro

I have been trying to solve a problem with my USB thumb drive. In Win 7 pro, I am unable to see any USB thumb drives in My Computer or Disk Manager. My USB mouse works fine. In Device Manager, I can see the drive but it has a yellow exclamation mark. In Properties, the system says Error Code 38. I have tried uninstalling and reinstalling the driver and all of the USB port drivers to no avail. I am able to get the USB driver to work in Safe Mode. I have also tried cleaning the registry without success. I have tried using Windows native troubleshooter - no help. Using MSCONFIG, I rebooted without any Startup programs or Services and in Diagnostic Mode - the problem still persists. Before I spend a day reinstalling Windows and all my software, I wanted to see if anyone could suggest a solution I have not considered. Thanks.

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Missing details about this PC.

Make, model, story "It worked until I installed this CD emulator" and such.

Windows can do this but my suspect is drivers such as motherboard drivers NOT USB drivers and apps.

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re: USB Thumb Drive Problem - Code 38 in Win 7 Pro

My computer is a Dell XPS L702X. The problem first appeared when I forced Windows to shut down by pressing and holding the power button after waiting a long time for the computer to shut down. I have reinstalled the chipset drivers and it did not help.

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There are prior code 38 discussion. Try.

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