I'm glad to hear your problem is solved, Di. An annoying trend I've noticed over the last year or so is the tendency for several program updates to be applied by third-party installers, and these often include a number of additional unwanted adware or malware programs, some of which can be disabled during installation if you happen to see the check box to turn them off, but if you don't, they can be rather difficult to remove.

The reason I use Malwarebytes is because the retail version has a function called 'chameleon', and this actually exits windows and runs in a protected DOS session while it does its thing, and it has never failed to remove even the most stubborn of malware apps which the free version can't. However, as your IOBIT safely removed all of your malware, I see no need for you to migrate to Malwarebytes at this time.

Incidentally, going directly to the manufacturer's web site is no longer a guarantee that the software you DL won't be infected with malware so it clearly pays to keep one's wits about them.

Cheers, Bill.