Cannot Install COMODO Firewall

I can no longer install COMODO Firewall, it gives me an error about manually removing any previous versions, but I have uninstalled them all. I even read that thread which explained how to use regedit and even used the COMODO registry cleaner in the System Utilities program, but to no avail. I’ve tried literally EVERYTHING and give up now.

I’ve attached the error log with this post, please help…

[attachment deleted by admin]

Did you follow the advice in this topic?