I recently purchased a Dell Inspiron 15 7000 Series laptop. It was operating on Windows 8.1 still, and I installed McAfee antivirus on it. However, anytime I opened up McAfee, everything in the program was miniature; everything was reduced to being extremely small, basically unreadable. I tried maximizing the window, which had no effect. Later on, I installed a few more programs from the web browser(not from the Microsoft store or whatever that is called). They too were all experiencing the same problem, they were all miniature. One of which was a game.
Basically anything I download via the web is impossible to use because it is reduced to an extremely tiny size.How may I fix this?
I have searched everywhere on google and have had no results.

I just used this program as a quick picture as I deleted the rest of the programs.

The first one is the regular window, whereas the second picture is the maximized version.

i931.photobucket.com/.../First%20pic.png