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DiMaria22l​ 

Please clear your temp files:

• Press the Windows key and "R" at the same time to open the Run dialog box.
• Into the new window, type or copy & paste:  "%temp%"  (Without the quotes.) > hit "ENTER"
• Now your Windows Explorer should have brought you to the "C:\Users\>your user name<\AppData\Local\\Temp" folder. > Delete all files and folders in it.  
  (If some files or folders can't be deleted, reboot and try again.)

Then:

• Go here and download "Revo Uninstaller. (The freeware version, Portable version works too.)
• Run "Revo Uninstaller" > Uninstall ME3.
• At the end of the main uninstall, Revo will ask you which cleaning method you want to use. > Select "Advance" > Browse.
• If "Remaining registration content found" is displayed > Select All > Delete > Next
• When "Remaining Data and Folders" is displayed > Select All > Delete.
• Restart the PC
  
• Repeat this with EA app.
• Download a new EA app setup exe from here. (Do it even if you already have the installer!)
• Install EA app.
• Install ME3
• Run EA app as Administrator > Click the EA app shortcut on your desktop > Run as Administrator. 
• Test.