The problem with installing Avast Premier on Windows 7 home

Avast Free Antivirus / Premium Security
1

Hi!
How to start the base filtering engine? Due to the lack of such avast is not installed. During startup, Avast will forgive you to activate the base filtering engine.
System Windows 7 home.
Thanks

2

Malware infection?

See here: https://forum.avast.com/index.php?topic=194892.0