While the Windows 8 Pro license allows for a downgrade to Windows 7, there is no assurance that Windows 7 drivers will be available either from Dell or the component manufacturer. Other versions of Windows 8 are not eligible to downgrade to Windows 7. These instructions are specifically provided for customers who purchased systems pre-installed with Windows 8 Pro who wish to downgrade their operating system to Windows 7 Professional. This article discusses the actions required to downgrade to Windows 7 Professional Edition on a system shipped with factory-installed Windows 8 Pro.
Update All Drivers from Dell Support Website.Changing System Setup Settings for Windows 7 Installation.Download Critical Drivers and Copy to a USB Key.