With Start 10 and OldNewExplorer installed, your windows 10 should act pretty much like win 7. With a few exeptions.....
If you're skinning for W10 exclusively remember:
1 "Aero peek" taskbar popups don't skin.
2 Don't bother with taskbar jumplists.
3 tool tip only works for mouseover on items, so don't bother with the "arrow", close, and config btton.
4 right click on desktop/taskbar uses a combo of classic colors and graphics. The menu background is the menu color and the "stroke" around the menu is the button shadow (correct me if I'm wrong guys i'm working off my memory) the item selection is still graphics based.
5 to change the taskbar expand "popup", skin the non caption window edge. Note: this section does not support transparency so a solid image with square edges is recommended.