Download Difficulty - Avast Pro

Hi! I used to have the home edition of Avast. Then I ran a restore disk on my computer to correct errors there were. Now I need to re-install Avast, so I did so, and chose the Professional one this time, as I am a developing business. But when I clicked on it after the download to finish the installation, I got this error message: “An error 1006 (000003EE) has occurred. Last performed operation was opening the self-extract archive.” What does this mean, and what should I do to correct the problem? Thanks.
Debby

Most likely a damaged installation file.
Please try re-downloading.