Microsoft has launched a new help site focusing solely on how to install, reinstall, upgrade or uninstall Windows 7, Windows Vista & Windows XP. If you are now planning to upgrade Windows Vista to Windows 7, this is a great resource!
Its a very exhaustive and helpful resource for those who may be planning to install, re-install, upgrade or un-install Windows 7, Windows Vista & Windows XP.
Visit Microsoft Help.
Microsoft has also made available certain documents touching on the subject of Windows 7 installation and upgrade. Get it here.
This tutorial tells you how to Repair Install Windows 7. At times, you might encounter a situation, where your Windows installation gets badly corrupted and even running system restore, system file checker, or trying other troubleshooting steps, does not really help, and you start thinking of re-installing your Windows operating system.
In Windows 8, Repair Install is called “Refresh PC”. It will keep your files and personal settings as it is but the rest will be reset to default settings. Any downloads from App Store will be removed.
Go here to learn how to install Windows 8.1 on a separate partition.