AV Clear Uninstall in Boot Manager

Dear All:

Recently I tried to uninstall the AV using the uninstall.exe in Safe Mode.
It didn’t work. Now I find in msconfig/Boot the listing of this Clear Uninstall.

I clicked and saved W8.1 as default and deleted Uninstall.
But after restart it comes back during normal startup.
How can I get rid of this problem?

I appreciate your comments.
Best wishes - and stay safe!
Henning

Hi, see: https://forum.avast.com/index.php?topic=230150.msg1523830#msg1523830