Pondus
2
there may be some hours wait before malware team is online, usually after work hours european time
to clean your USB stick install MCShield http://www.mcshield.net/
you find instructions here https://forum.avast.com/index.php?topic=53253.0 if you scroll down to … SPECIFIC INFECTIONS LOGS
this log you copy and paste here (not attach) or we cant read it, some forum issue 