Installation program not actually installing Avast

I removed Avast from my PC to troubleshoot a software issue. Now I am re-installing, but each time the installer completes “successfully” and says the PC will reboot. After the reboot… no Avast software is installed! wtf. I have tried the avast clean installer program, etc. Same thing every time.

It literally just “disappears” like I never ran the installer at all.

This is happening to me too. New computer , tried everything and it just wont install. it says successful and reboots but avast doesnt load. there arfe no avast icons anywhere. its not in control panel so its not registered as installed app. In program files form i see avast folder though so look like it just fails to run. I even tried running the avastui executable after but no joy. Tried an older offline install from dec 2023 and that didnt work, I tried all the latest online installers…

I reinstalled windows on this brand new machine cause of this and still no joy… unreal

Edit: Tried running installer as admin and used the avast clear and removed in safe mode and all…
Any suggestions?