Windows Focus Logger Indicates Process "PMA" is Stealing Focus

I have been having this problem for maybe a month and a half now, and have only recently seriously begun attempting to solve it. During normal use of any application, be it games, coding software like GMS2, or any other application that has my focus, my focus will be taken away from that application with no indication of what stole the focus. This results in me typing and having my text not appear because focus is lost and minimization of games in the middle of play often resulting in crashes. Yesterday I downloaded "Windows Focus Logger" from Adminscope to get a look at the problem. I left an application running and came back after it was minimized, and was told that a process named "PMA" had stolen focus several times.

The only major changes I've made to my computer have been the installation of an Epson Workforce WF-2860 printer. I have seen a claim online that installation of one of the printer's programs solved the problem, but they did not specify what program.

What is PMA? How do I found out where it is, and how do I stop it? I'll be happy to provide any additional information as requested.

Yes, that was the solution that I referenced in my post, but as I said it does not specify which program was causing the issue. I don't want to have to uninstall my entire printer to solve the problem. (Obviously if that is the only solution I will but there aren't really any other places I can install my printer)

This is Windows Focus Logger reporting on PMA's interference. No data is given for "Main Window Title"

Thank you very much for your help, I identified PMA.exe as a process called "Epson ReadyInk Agent (A) (32 bit)" doing what you instructed. Not wanting to just end the task because it might be important for my printer, I right clicked > Properties > Compatibility then checked the box "Disable fullscreen optimizations". Hopefully this will solve the problem, I will let Windows Focus Logger run overnight and report if any similar errors occur.

Thank you for linking me to that forum, it was quite helpful. It turns out Epson ReadyInk Agent is a service that automatically detects when you're low on ink and has it shipped to you. Which, obviously, is insane, and I was at no point even prompted to sign up for the service so it was just running in the background stealing focus once an hour because I'm low on black ink. After looking it up, no harm comes from simply uninstalling the program, so I headed to Add or Remove Programs and uninstalled it. I'll let Windows Focus Logger run for another 12 or so hours just to make sure, but I'm pretty confident that was the culprit.

No errors to report! Uninstalling Espon ReadyInk Agent was the solution, thank you very much for your help Try3, I could not have accomplished this without your help! I now deem this issue solved.