The following topics contain information about upgrading and installing Windows 7—including procedures, best practices, and the difference between performing an upgrade and doing a custom (or clean) installation of Windows.
Installing and reinstalling Windows 7
Installing Windows 7: frequently asked questions
32-bit and 64-bit Windows: frequently asked questions
Windows 7 installation problems: frequently asked questions
Upgrading to Windows 7: FAQ
Installing Windows 7 on a netbook
For step-by-step tutorials on how to upgrade a computer running Windows XP or Windows Vista to Windows 7, see Upgrading from Windows XP to Windows 7 and Upgrading from Windows Vista to Windows 7.