Author Topic: Why won't avast! Free antivirus install after restart, and there is no AvastUI?  (Read 786 times)

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Offline peterhappywheels

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Hello, I have trouble installing Avast on my Lenovo M90 5391 SF. It still promts the restart after setup window but no const, and when I try to scan, error pop up appears and it says Avast UI.exe is not launched, but there is no AvastUI.exe. Help!

Offline Asyn

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- OS..? (32/64 Bit..? - which SP/Build..?)
- Other security related software installed..?
- Which AV(s) did you use before Avast..?
Win 8.1 [x64] - Avast PremSec 21.11.6787.IBC [UI.679] - EEK - Firefox ESR 91.3 [NS/uBO/PB] - TB 91.3.2
Avast-Tools: Secure Browser 96.0 - Cleanup 21.3 - SecureLine 5.14 - Driver Updater 21.4 - CCleaner 5.87
Avast Wissenswertes (Downloads, Anleitungen & Infos): https://forum.avast.com/index.php?topic=60523.0

Offline peterhappywheels

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It is Windows 8.1 x64 and I didn't install any other antivirus software at all. Here is all info I have.

Offline Asyn

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1. Download Avast Free Antivirus: https://files.avast.com/iavs9x/avast_free_antivirus_setup_offline.exe
2. Follow instructions: https://www.avast.com/uninstall-utility (Run this tool for all prior installed Avast versions..!!)
3. Reinstall Avast with the downloaded installer from point 1.
4. Reboot.
Win 8.1 [x64] - Avast PremSec 21.11.6787.IBC [UI.679] - EEK - Firefox ESR 91.3 [NS/uBO/PB] - TB 91.3.2
Avast-Tools: Secure Browser 96.0 - Cleanup 21.3 - SecureLine 5.14 - Driver Updater 21.4 - CCleaner 5.87
Avast Wissenswertes (Downloads, Anleitungen & Infos): https://forum.avast.com/index.php?topic=60523.0

Offline peterhappywheels

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I tried everything you listed and, it won't finish the installation, the icon is not on the desktop, and asks me for AvastUI.exe to start but there is no AvastUI.exe.

Offline Asyn

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Win 8.1 [x64] - Avast PremSec 21.11.6787.IBC [UI.679] - EEK - Firefox ESR 91.3 [NS/uBO/PB] - TB 91.3.2
Avast-Tools: Secure Browser 96.0 - Cleanup 21.3 - SecureLine 5.14 - Driver Updater 21.4 - CCleaner 5.87
Avast Wissenswertes (Downloads, Anleitungen & Infos): https://forum.avast.com/index.php?topic=60523.0