Avast USB scanner and USB Disk Security

Hi Avast Forum Team, I just wanna ask if your using usb disk security and you plug-in a usb on your laptop or desktop, the usb disk security will scan your usb first for any threat, does it over-rides the avast usb scanner?

Thanks in Advance

I just wanna ask if your using usb disk security
Most regular forum users here use MCShield www.mcshield.net it is a install and forget program