Some Tips that should always be followed when installing something new to your computer:
1. Always create a System Restore Point
"Start -> All Programs -> Accessories -> System Tools" or,
Type sysdm.cpl into the Run Command window or the Windows Search Box
2. Always select the Custom (Advanced) method for your installation
Almost all installations offer 2 options:
Standard (or Easy or Express) or, Custom (or Advanced).
Always select the "Custom (Advanced)" installation because this type of installation affords you full control
over the installation. If you don't select the custom installation, you'll not be able to select or change various parts
of the installation and it'll install the software with preselected configurations.