Legit software or decompression bomb?

Hi, I’m a student that got a Silidworks license from school but the thing is that Avast keeps saying that some of the software is decompression bombs.

Has anyone had this happen to them?

Have I been given a virus infested zip from Solidworks? It seems unlikely as that would be just so unprofessional. Which is why I’m guessing Avast is being over protective. Or can a decompression bomb attach itself after the download is made?

It’s really annoying as I don’t dare to use the program until I settled what is going on. Hope someone can help!

Thank you. 

SolidworksGeneral