miriguy wrote:got a question here, if a dell desktop [full set dell] formated with vista, can i juz format it or clean install in normal way to change to window 7 ?
Directly from Dell:
Upgrade Program Description
To be eligible for the DellTM Windows® 7 Upgrade Option program, you must purchase a Dell system between June 26, 2009 and December 31, 2009 that meets the following criteria:
* Your system must have one of the following operating systems Windows Vista® Home Premium, Windows Vista® Business, or Windows Vista® Ultimate factory installed OR have Windows XP pre-installed with Windows Vista Business Bonus, or Windows Vista Ultimate Bonus.
* The system must be included in the list of Eligible Systems for an upgrade.
The upgrade version received will be comparable to the version of Vista already purchased. See the table below for details. Requirements subject to change and are based on currently available information from Microsoft.
Please note: if your system is operating Windows XP, to upgrade to Windows 7 you must first make backup copies of all files currently on your hard drive. A clean installation of the Windows 7 operating system is required, and so the DVD provided as part of your upgrade kit will overwrite all remaining data on your hard drive. Dell is not responsible for any data lost during the upgrade process.
From the bolded part, its likely that you have to install Windows Vista before you can upgrade to Windows 7.
Only if you bought Windows XP, then you can do a fresh install.