If it happens the exact same way when the Intel card is "forced" to be the one working, I'd fall back to suggestion looking at the drivers.
First try just updating the Intel drivers *edit* Yes it seems there are drivers from 3/8/2016
https://downloadcenter.intel.com/
If that doesn't do it, then I'd start wiping them, cleaning the remaining traces with DDU and starting over. From that thread above I linked should have the details about DDU etc.
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You can try adding the right-click menu to Windows to force launch apps with the nVdia.
Described in this article at the bottom:
https://support.lenovo.com/us/en/documents/ht051526
You would need to have Origin open and logged in. Then you should be able to find the game's EXE (or shortcut) and do the right-click force launch.
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Yeah it's below requirements (rare for games to list mobile anything for requirements). I think it should still at least launch and display on the screen. I mean there are youtube videos of people with only HD4400 and they have it running (very low resolution with some framerate hiccups but it "works").
Your CPU is a dual core with 4 threads thanks to Hyperthreading. That's the same as the minimum requirement Intel chip i5 650. Depending on which benchmarking software you use they trade winner scores (i.e. some software/benches take advantage of the newer instructions the 4500 can handle).
In my opinion it should at bare minimum be able to launch the game and display it. How playable it is after that could be up for debate.
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Back to Optimus...
Windows 10 makes it easy to reinstall.
http://www.tenforums.com/tutorials/16397-repair-install-windows-10-place-upgrade.html
If you select the right option you won't loose data but Windows will be defaulted like it was fresh installed. Games won't technically be installed anymore but if you point Origin to the game's files, it won't need to download them again, it'll just jump straight to installing.
I wouldn't do this unless you've exhausted all other methods of trying to get nVidia Optimus to act right.