There is no difference in the pro version and free version of malwarebytes other than the pro works in the background trying to make sure you keep protected. The scans are both the same.

There is also no such thing as a perfect antivirus.

I have working on computers for 20 years and just about seen it all.
You didn't mention what operating system you are running or what browser you use?

Check your browser here
Qualys BrowserCheck

outdated programs like adobe can be a problem

There are several cleaners you can use but I warn you that you can get in trouble when running these unless you know what you are doing and sometimes when you know what you are doing you get in trouble. Ask me

There are many malware help sites on the internet that can help you and I highly suggest you post there instead of here. google bleeping computers and smartest computing and you will see malware forums to post to.
To become an expert in removing malware it takes lots of know how and patience. Again ask me how I know Cheers