I'm having trouble with a McAfee pop-up of a potentially unwanted program blocked keeps popping up after i click remove its Pup-fps
This usually is a Detection given by McAfee and has different variations. There are different Removal Guides to suggest, However basically use the same Reliable/Reputable Tools. So I will basically suggest you run each.
1- McAfee Stinger (Read How to Use)
2- Malwarebytes (Free) To keep it Free DO NOT accept or enable any Free Trial Offers/or Activate the Paid or Pro Version. The Free Version will suffice.
4- Junkware Removal Tool
You are better served if saving these programs to your Desktop, and closing all applications/To include Browser before scanning. Go to your saved folder and Open/Install/Run. Follow Guidelines/Instructions, as generally you have to do a restart to remove all remnants entirely.
To get a better understanding of how these PUPS arrived on your system, You may find these two articles most informative:
Wishing you all the very Best
McAfee Volunteer Moderator
As you can see there are many Detections regarding (Pups) as McAfee Labs acquire over 150,000 plus new Detections on a daily basis :Antivirus Software and Internet Security For Your PC or Mac | McAfee