If you were never interested in Vista, it is quite understandable. A lot of users upgraded directly from their beloved XP to Windows 7 mainly because of stability and speed which were possibly missing in Vista. Even though Windows 7 is a vast improvement in terms of user interface/experience, the element of simplicity like the easy to use start menu (as in XP)  is still missing. So for those XP lovers who are looking ways to get the old menus back, here’s a quick solution. Use Classic Shell.

It is compatible for all versions of Windows 7 including 64-bit editions.

[source: howtogeek.com]