Many times AV firms show false posatives.  It's a good thing to be cautious but if you got WB from Impulse you can bet it's ok.

What av are you using?

Avast!   there's your problem right there.

I tried that POS AV and it nearly sent me to the nuthouse with it's popups, and warnings and total BS.. I had to turn the pc off just to get out of it, and to prevent me having a fit and renewing a gun license and buying a pump action and shooting the damn thing.

Avast----> Be afraid.. be VERY afraid.