Computer monitors are getting bigger and their resolution are very high. This will make AutoCAD icons and labels looks very small. If you are familiar with Windows display settings, you probably tried to make the texts look larger using this method: Change text size on AutoCAD interface.
The bad news is AutoCAD doesn’t work well with high resolution monitor. Monitor with resolution higher than 2000 and changing text size will give display issue. This is an example what might happen: AutoCAD text overlapped in some palettes.
This is the solution Autodesk offers in knowledge base: Adjust the font size back to 100% or disable DPI scaling.
In AutoCAD 2016, there is a bug displaying Start tab and Help windows. They might not displayed correctly on Windows 8.1.
Image from: Up and Ready blog.
Autodesk has released a hotfix that you can download here: Start tab and Help windows don’t display correctly in AutoCAD 2016.