Avast keeps warning me threat have been blocked but cant find it "..appdata\temp

Hello there,
Am having a problem with Avast
it keeps warning threat have been blocked
and after warning me it disables desktop icons, taskbar,and start menu

[i]C:\users\appdata\Local\Temp\..\app.exe[/i]

BUT i can’t find it when i search in the related folders
Any help?
Regards

Attach your basic diagnostic logs. (MBAM and FRST)
Instructions: https://forum.avast.com/index.php?topic=194892