Need some advice on scanning for viruses and malware on Windows 8

HI I was wondering if I could ask a question about Windows 8 and what programs I can use to scan for viruses and malware infection with. Tonight a lady that I now told me that she has a windows 8 desktop computer and she is not sure whether it has a virus on it. She told me that her computer is really slow though and she would like it if I would take a look at her computer sometime. My question is this I now malwarebytes free works in Windows 8 because I have a windows 8 laptop what I am not sure of is does Otl or ambr work in windows 8 to be able to scan for viruses and other malware on Windows 8 as of yet.

I was also wondering does adwcleaner work on Windows 8 as well?

If Otl does not work is their any other program that would beable to scan for viruses on Windows 8?

Thanks very much for your time and advice as always.

All mentioned tools work, except aswMBR.

Thanks Asyn for your advice.

You’re welcome Diddy.