Re: can not sign in to Orgin, it says

@CHDTOF  The first thing to try is running Origin as an administrator.  Right-click on the icon to see the option.  The next step is to clear Origin's cache.  If neither of these helps, uninstall Origin itself ("the hard way") and reinstall it.

https://help.ea.com/en-us/help/faq/clear-cache-to-fix-problems-with-your-games/

https://help.ea.com/en-us/help/origin/origin/manually-uninstalling-origin/

If you still can't install your game, please run a dxdiag and attach the results to a post here.

https://help.ea.com/en-us/help/pc/how-to-gather-dxdiag-information/