@ blackeyedgurl,
1. What is your OS (32 or 64-bit)?
2. What version and product of Avast did you or are you trying to install? Did you have a previous version or product of Avast on this machine? If you did, did you run the Uninstaller Tool for this other version as well?
3. What other security software do you have currently or previously on this machine including antirvirus, firewall, and other security software? If you uninstalled, did you use the vendor's uninstaller's tool or do it some other way?
4. How do you connect to the Internet (Broadband/Cable, DSL, Proxy)?
- Open Avast GUI > Settings > Updates > do you have anything checked off under "Update Parameters?"
- Open Avast GUI > Settings > Updates > which bubble is checked off under "Proxy Settings (1st, 2nd, or 3rd)?
Thank you.