The upgrade version of Windows 7 (as opposed to the higher-price full version) lets one move from any properly licensed version of Windows XP or Windows Vista to Windows 7 on that same computer. Only certain of these upgrades, however, can be done as a simple update--what Microsoft calls an "in-place upgrade." Users moving from Windows XP, switching from 32-bit to 64-bit versions, or moving from a higher-end version of Vista to a lower-end version of Windows 7 can use an upgrade disc but will have to do a more cumbersome upgrade, known as a custom, or "clean," installation.


The difference between an in-place upgrade and a "clean" installation, in this instance, means backing up one's data, installing Windows 7, restoring the data, and reinstalling all Windows programs. Windows 7 upgrade disks can be used to do this clean installation and will recognize the previously installed version of Windows. So if you don't have any previously installed Windows on the machine, you will want to get yourself a full copy of Windows 7.
________________________________________________
Helichrysum Oil
Pasadena Skin Care Center