Avast won't scan Yahoo

I have the Home edition, and when someone does a Yahoo file transfer to me, it asks me where to save it, and when it completes, I get a message that Avast couldn’t start to scan the file I just downloaded.

What gives?

Sua,

What is the file type?

Do you have Avast set to scan zips?

There isn’t any reason I can comment on now as to why it will not scan the file downloaded from Yahoo.

More information is needed.

Techie

99% of the time, it’s a .jpg or .bmp file.

I get the message that it is unable to start the Avast scan.