I am unable to open any PDfs. I have followed all troubleshooting steps I can find.

I am unable to open any PDFs on my computer. I have uninstalled, reinstalled and it worked for a few minutes, then the open files disappeared. Now when I try to open a PDF, I get a small circle on my desktop. See the attached jpgs. I cannot move it or expand it. When I click on the circle  the icon on the task bar disappears, maybe it shuts down.? I have installed, reinstalled, repaired multiple times. Any assistance will be appreciated.