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A while ago I had some hardware issues with my desktop and used a USB stick to put a bootable memtest on it to do some diagnosis (at the time it was that one of the memory sticks was bad). Fast forward several weeks later however and now I'd like to find a way to get rid of memtest on my USB so that I may use it again for storing small documents and things of that nature.

Would anyone know how to restore a USB stick to its original state?

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Waht happeens when you attempt to format the USB stick? What is the host OS you will connect USB device to? –  Dave M Feb 6 '13 at 22:18

2 Answers 2

Just format the drive, which will make it unbootable and empty.

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No need to format your device!
If you can't remove or change anything, then probably your USB Stick is in "Read-Only" state.
Otherwise, smtg is wrong with your driver or there is a stupid virus.

But if all is OK, just make your Windows show all System and Hidden files,
or start CMD.exe and write there:

attrib -s -h -r <your drive>\*.* /s /d

Now all files are visible and are not Read-Only, including memtest. Now you can remove all odd files!

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