The Windows 10 platform is actually very easy to use. Call it a hybrid of the best from Windows 7 and the best from Windows 8.1.
It is a different interface than what people are used to from Microsoft PCs but the Windows 10 overlay can be moved out of the way to allow for traditional Windows 7 type interface. Anyone who has used a Windows phone should have no issue with the PC/Laptop version, especially if they have a Touch Screen PC.