Unity resolution changed since I update my pc on Windows 10

When I had got Windows 7 on my pc, I worked on Unity 5 with a resolution screen of 1680x1050 pixel… after updating my pc with Windows 10, the resolution changed in 1280x800, and my desktop has already a resolution of 1680x1050…
I don’t know why! Has somebody got a solution?

I don’t know if you figured this out, but I recently upgraded to Windows 10 and was bothered by the same problem, which led me here.
This is not caused by Unity, but by Windows. To solve it, right click your Unity shortcut, click properties, go to the “Compatibility” tab, and check the “Disable display scaling on high DPI settings” box. Restart Unity, and it should be all sharp and pretty like you’re used to.