PC hang when run avast

Avast Free Antivirus / Premium Security
1

Hi All,

I’ve re-setup my laptop, but when I run avast (free version), the pc hang forever :(.
My laptop is: HP, Cpu cori5, ram4gb.
Realy dont know why, bro pls help.

Regards,
Thanks

2
I've re-setup my laptop
what does that mean?

does it mean you have restored it to factory specc?