USB Threat Defender not work very good as some one said have a look at my USB some things that you may like and next Bull Guard Antivirus said stop and Quarantine > Trojan-Autorun.INF.gen, Aware.Generic.84731, Svchost.exe-Trojan-Agent-AFUQ\recycled, all in Quarantine ? so I Delete.
Now some info on USB http://www.consumersearch.com/usb-flash-drives
http://www.consumersearch.com/usb-flash-drives/useful-links
http://www.pcmag.com/article2/0,2817,1849713,00.asp
The Ultimate USB Key