Hi guys and girls, just a few points about Malwarebytes.
Always make sure that you download the software from the malwarebytes.com site, as per DD's link above.
The free Pro version expires after 14 days and reverts to the free version, after this time you will need to manually run a scan to detect and remove any malware, the Pro (Paid for) version works in real time and constantly scans your PC, preventing malware getting onto your PC and spreading, it also protects you from Ransomware, Malicious websites and exploits.
I have been using the Pro version for many years and I can't speak highly enough of this package.
The free version is still very good but I always think it wise to prevent any infection first, rather than having to deal with it after it has landed and possibly spread. So I pay for the Pro version, it is well worth about £45 for a 2 year licence.