How To Restore The Missing Windows 8 Start Button
Don't worry if you're not as stoked as Microsoft about ditching the Start menu. It turns out you can have your cake (Windows 8 and all the speed improvements that come with it) and eat it, too. There are a handful of ways you can restore the Start menu in Windows 8, provided you're willing to install a third-party program.
One of those programs is Stardock's Start8. Currently in beta, Start8 is free to download but will cost $4.99 in final form when Windows 8 ships later this month. The neat thing about Start8 is that the Start menu automatically matches the color scheme you have selected. There's also a handy option to bypass the Windows 8 UI completely and boot directly to the desktop, complete with Start menu, though be warned the feature doesn't work in virtualized environments.
Image Source: ClassicShell
Two other popular programs include Power8 (open source and free to download) and ClassicShell (also free). None of these three programs should affect the overall performance of Windows 8, minus the miniscule amount of resources they consume.
If you're not feeling any of those, yet another options is ViStart 8, which the developers bill as being "The ultimate Start menu for Windows."