Some good advice above from Mfletch,see how you get along.
Thing is when you are formatting the drive,are you just formatting one partition (if more than one).
If all else fails,try the below;
Flash drive infections usually involve malware that loads an autorun.inf file into the root folder of all drives (internal, external, removable). When the removable media is inserted, autorun looks for autorun.inf and automatically executes another malicious file to run on your computer. When a flash drive becomes infected, the Trojan will infect a system when the removable media is inserted if autorun has not been disabled.
Please insert your flash drive before we begin!
Download Flash_Disinfector.exe click here by sUBs and save it to your desktop.
* Double-click Flash_Disinfector.exe to run it and follow any prompts that may appear. * The utility may ask you to insert your flash drive and/or other removable drives. Please do so and allow the utility to clean up those drives as well. * Wait until it has finished scanning and then exit the program. * Reboot your computer when done.
Note: Flash_Disinfector will create a hidden folder named autorun.inf in each partition and every USB drive that is plugged in when you ran it. Don't delete this folder...it will help protect your drives from future infection.
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