We are glad you found the suggestion useful. This layout is still available on Windows 10 but the location is slightly different. You need to go into ‘Settings’ from the Windows icon on the bottom left. This has replaced the old ‘Control panel’.
Then choose ‘Time and Language’ and ‘Region and Language’. Click on ‘English’ and you should see a button called ‘Options’.
Click on this and then click to ‘Add a keyboard’. Scroll down the list to find United States International and click to add it to your language bar, which should be visible in the bar at the bottom of your screen.
The benefit of using US International is that it allows you to make all of the French accents easily without having to get used to a French keyboard.
Everything is done by pressing one of a small number of keys: the one on the top left of a Qwerty keyboard with several short lines on it is used for grave accents, the apostrophe key (to the right of the keyboard near Enter) for acute ones and for cedillas on C, and the ^ key (shift+6) is used for circumflexes.
Shift+apostrophe gives the tréma (two dots) used on words like Noël.
Simply press one of these keys followed by the vowel you want to modify.
One slight drawback to the layout is that the @ and “ keys are swapped compared to a British keyboard, so some people prefer a version called UK extended (see https://goo.gl/1obq1y for an explanation of this).