Virus detected. how do I remove it?
First get another antivirus &amp; see if it agrees.

Google 'Mac free antivirus'. Pick one you've already heard of.

If it agrees you just saved yourself some money.  

If it disagrees, then there are 3 possibilities.


The first antivirus was more accurate.  
The first antivirus was less accurate &amp; is showing false positives.  
The first antivirus just wanted to scare you into buying it.


We may never know which.

If you can find the files referenced, you can upload them to Virustotal for further evaluation.