strange error message after Avast reinstall

Since the most recent program update ,I have experienced numerous issues (see my topics and posts). After trying an Avast repair from the Control Panel that failed, I did a complete uninstall. I followed the directions as instructed and did a complete reinstall. I let my system rest for a few days.
Logged on Friday only to receive a Windows security center message to update Avast (?). When I attempted to update I received this: error code 0x40000015 occurred at location 0x71a327c.
Anyone have a clue? Now I am unable to do anything with Avast program
Thanks in advance.

What OS/SP?
What exact version of avast ?
Any other security (related) software installed (or did you have) ?
When doing the uninstall, did you use the uninstall tool ?

All of your questions Eddy I believe are answered in my post and my signature except one. No, I have no other security software installed that isn’t listed in my signature. Thanks for your quick response.

I suggest a clean installation of the latest version and see if it solves the problem.
https://forum.avast.com/index.php?topic=168189.0

I completely understand Eddy. But, whatever is wrong (the error code I gave you) keeps me from even uninstalling Avast. I am totally unable to open Avast from anywhere on my system.
I am happy to see Avast did some fixes… but my issue is major. I am exploring the idea of doing a system recovery. Any advice anyone?
Thanks for responding.