After Update Restart Avast One no longer starting and AvastUI.exe disappeared

[sd8974]

Hi,

Yesterday I restarted my PC, due to the latest Avast One update, but Avast One is no longer starting, or showing in the windows notification area, and AvastUI.exe has disappeared, meaning I can't even run the program manually.

Anyone else had this? Any guidance on an alternative start-up method, or will I need to re-install the whole program?

Thanks,

Shane.

[DavidR]

Not using Avast One I can't comment from personal experience.

Doesn't Avast create a desktop shortcut, it does/did on my Avast Free version.

What is showing in the Windows Task Manager  ?
It it isn't showing the avastUI.exe, is it showing any other Avast program files  ?

Is Windows Defender running (it should be disabled by windows when you install Avast)  ?

[sd8974]

I didn't choose to keep the desktop shortcut, but the app shortcut in C:\ProgramData\Microsoft\Windows\Start Menu\Programs just states that AvastUI.exe has been changed or moved - as it is no longer in "C:\Program Files\Avast Software\Avast", or anywhere on my C Drive.

Only the below processes are running in Task Manager. As I say, Avast has just stopped opening/running, so yes Windows Defender has automatically taken over. I only realised that by checking to see if Avast had been updated correctly when looking for the icon in the notification area.

[DavidR]

Have you tried disabling Windows Defender - as when another AV is installed it should be automatically disabled by Windows - so if you reinstall the Avast Antivirus program Windows 'should' disable Defender.

If that doesn't work - You could try an Avast Repair see https://support.avast.com/en-gb/article/Troubleshoot-Embarrassing-UI-Failed-load/#pc - Avast Antivirus.

[sd8974]

I don't see an option to disable Windows Defender, even though Avast is still listed as an Anti-Virus option.  I do have the options to "Open the App" or "Turn On" for Avast, neither of which do anything.

So, I tried to uninstall Avast, but that doesn't work either as the file necessary for that has also gone!

I think I'll just try re-downloading a fresh copy and installing, assuming it will just over-write the existing files where necessary.

[DavidR]

Yes, the uninstall in itself wouldn't work, but as the instructions in the link I gave mentioned, there is an option to Repair rather than uninstall (but you have to first select uninstall),  did you not see that or try it  ?

[sd8974]

Yes, I followed the instructions but I don't get to the option to choose Uninstall or Repair, as the file to start that process is no longer there, just as the AvastUI file is no longer there:

[DavidR]

Yes, I followed the instructions but I don't get to the option to choose Uninstall or Repair, as the file to start that process is no longer there, just as the AvastUI file is no longer there:

Looks like you are only left with a reinstall as you mentioned.