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Install & Run Malwarebytes program
http://www.malwarebytes.org/
Remove flash drive.
Install Malwarebytes >> Update >> Quick Scan >> Ok; Remove Selected

Reboot Windows.

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Install MCShield program.
Install >> allow update
Add flash drive and whait for MCShield to remove malware.
Please paste or attach here log from MCShield ( AllScans.txt )
location:
Start >> All Program >> MCShield >> Logs

It will not just remove malware from flash drive,it will prevent infection by computer via any other USB flash drive, mobile phone or any memory card.
And not only will prevent infection, but will immediately clean Memory card or external HDD