New
#10
Edit: (I actually read this wrong...sorry...thought you said you were still using Win7.)
Under the hood, Win10 is far better than Win7 (Win7 is actually getting fairly long in the tooth, imo...;)) When Win7 was new it was by far the best OS Microsoft had ever done, but Win7 hasn't been "new" in many years. (Compared to Win10 it runs like it is mired in molasses, imo.)
I cannot tolerate the the Win8/10 Metro UI and fear it will never, ever grow on me. But that's the thing most often ignored by people--in both Windows 8 and Windows 10 you can boot straight to the desktop and forgo the Metro UI completely and the ooooo-gly full-screen start menu and those hideous square tiles that take up so much room unnecessarily. Main difference between Win10 and Win8 in that regard is that while Win8 forces you to install a start menu if you want one (like the Windows 7-style Classic Shell start menu that is free and highly regarded), Windows 10 actually comes standard with its own start menu, again (like Win7.) It takes but a few mouse clicks to remove the tiles from the Win10 start menu (and they never come back) and the system boots into a desktop by default if that's what you want. Best of all, no advanced-knowledge tweaking required--it's all built-in the Win10 UI, standard...;)
The Metro UI is so ugly because it is designed for a touchscreen--big square tiles that are mostly blank when displayed, etc. But in Win10, Microsoft suddenly remembered its ~1.5 billion Windows users worldwide who needed and wanted and preferred a UI made to interface with mouse and keyboard. (How the company forgot where its bread was buttered with Win8 is beyond me.)
Anyway, the start menu is no reason to skip over Win10 because Win10 has one. Found this old screenshot to illustrate: