I always recommend deleting as many traces as you're comfortable messing with.
However, the problem with the "installer" you are all using is that it isn't actually an installer, but moreover a launcher that detects files, then either adds or triggers the installer in your program data files. Unfortunately it won't trigger the installer if there's traces left-over, but you can manually launch it yourself.
So, if you're seeing this message then you've already installed the game and this file should be in your computer.
To install it, simply follow the steps below:
Open Windows Explorer (or press Win+E), then copy and paste the following filepath into the navigation bar:
C:\ProgramData\Package Cache\{C2622085-ABD2-49E5-8AB9-D3D6A642C091}v12.0.58.4866
Double click on the file in the folder called "EADesktop-12.0.58.4866-242.msi"
This will launch a legacy version of the installer that will allow you to choose an install location and just install it the old fashioned way.
If future users encounter this problem there may be different versions of the app with a slightly different name (like EADesktop-12.1.62.2112-344.msi). That's fine, you'll know the file when you see it. If this happens, the directory may change as well.
If the directory I listed above doesn't work, then follow these steps:
Navigate to C:\ProgramData\Package Cache\
Then run a query for "EA Desktop" in Explorer's search function.
You'll see a folder that looks like the "{C2622085-ABD2-49E5-8AB9-D3D6A642C091}v12.0.58.4866" folder you see listed above, but with different characters.
You'll also see something with EADesktop quoted as being in it. That's your folder. Open that folder and run the msi installer inside.
After installing, simply restart your computer and launch EA Desktop from the Start menu.
From there, I recommend looking up how to use EA's programs to uninstall the app should any future errors occur. This way you don't run into the same issues again.
Hope this helps!! =)
ps: if you can't find the folder nor the installer, then I've uploaded the file to my Google Drive. I will keep it there until EA Desktop goes out of Beta
