HELP PLEASE!! Laptop freezes even in safe mode(s)

Hello,

I have an laptop Hp G62 which I bought about 4 years ago and it seems to be infected. A couple of weeks ago a got a screen while surfing the internet and my laptop froze. Now, even in safe mode it freezes. I contacted Mccafe virus people and they told me that it was my system or hard drive or something like that. I did not quite believe them as they attempted to charge over 200 dls to fix it. Ido not have that kind of money.PLEASE HELP! and thanks for reading this.

Hi could you go to this link https://forum.avast.com/index.php?topic=53253.0 scroll down to If you cannot Boot the computer and follow those steps
Attach the logs here