Hi Seany0007,
Your failure at step 6 is due to Comodo a/v being installed whilst you attempt to install Avast!
No way around it. Can't do. It doesn't matter if real-time protection is turned off in Comodo.
Your system is telling you can't. Nothing I or you or anyone else can do about that.
Either keep Comodo or Avast. Install a/v offline will ensure your system is protected from the get-go when you first go online.
If you want to keep avast version 6, you can, but you first must disable automatic updates to do so.
That's not true as I already got rid of Comodo AV and Avast still fails. So no it's not the case.
Because I use Comodo firewall another area where Avast let many ppl down. Stop pointing fingers at Comodo it's Avast fault and they don't want to take responsibility for it.
Sorry, it wasn't clear you've uninstalled COMODO antivirus before trying to install avast!
Need to point out every member helping you is a member just like you. Except for Tech, iroc9555(?), there have been no representatives here from the actual avast team that have spoken to you.
Since COMODO antivirus comes with the COMODO Internet Security suite, it may be necessary to completely uninstall CIS to get avast to install once again. This is one step I've not seen you take. Yes, I am aware COMODO a/v is an optional install as I chose to keep only the firewall and not put the a/v in. If you look at my sig below, you will see I do not now have COMODO CIS.
Not clear yet whether you are using a free version of CIS ATM.
Using the uninstall tool would be best even if you have already uninstalled COMODO a/v. I would put it back in to get the download listed below, though. Or use another computer to get the files I needed.
Obviously, you've got to be offline when you uninstall/install.
Tool for uninstalling CIS here:
https://forums.comodo.com/install-setup-configuration-help-cis/uninstaller-tool-for-comodo-products-t71897.0.html (latest version) Read the thread first to know what is involved.
Tool for completely removing all remnants of avast! here:
http://www.avast.com/uninstall-utility