I think this guy just hates Avast, read his other posts.
As you can see help is too late here
he already format his computer
look at his post.
this is the effect of final installation without knowing what is the product first.
even he installed other security software it will also happen like this.
because if his/her computer is infected with a rootkit, it will hide the real file and replace it with an exe folder. this can be cured by folder option show hidden file. but if the computer is hijacked he cannot use the folder option.
after installing he suffer from loop reboot cause also of rootkit that hide the system at start-up is not present because it is hidden, cannot find the file, etc.
and his decision is final to get refund.