Well this stiuped

Viruses and worms
1

Antivirus is essential tool that most people need to protect their Windows operating system from Viruses, Trojans, and other bad stuff.

Unfortunately, most Antivirus companies goes too far with their Virus/Trojan protection, and in many times they classify completely legit software as Virus/Trojan infection.

Also 1 thing , even if you place the option to select what anti-vírus should do about the detected Suspect File/ URL you still being forced to delete the vírus.

2

?? ???

3

What legit software?
What malware name does avast give the file?

Have you tested that file at www.virustotal.com ?.. if tested before click rescan
Post link to scan result here