Can't install latest blender on windows I go to the blender website
Select the 64 bit US instillation for my Windows 7 Desktop Computer.
After downloading I open the Blender Set Up Wizard and I am given three options: Change/Repair/Remove
I have tried to Change and Repair but once completed if I open Blender the Update has not been installed and the blender is still the older version.
I am considering uninstalling everything and trying again but I have several projects on the current blender and I can't risk loosing them


Can anyone help explain to me what steps I can take to safely install and apply the latest version of blender. I have version 2.66a and I'm trying to get the latest 2.76b. 

Any help would be greatly appreciated!
From the manual:

Download the .zip or .exe for your architecture (64bit is preferable if your machine supports it).

The .exe will run an installer to choose where to place Blender and to configure MS-Windows to have an entry on the menu and to open .blend files with Blender. Administrator rights are needed to install Blender on your system.

Note:
With .zip you have to manually extract Blender to the desired folder, where you can double-click the executable to run Blender.

There is no installer to place Blender on the menu, but there is also no need for administrator rights. With this option it is possible to have multiple versions of Blender without conflicting, as they are not actually installed on the system.

https://www.blender.org/manual/getting_started/installing_blender/windows.html