I can not install Windows 7 on the Dimension E520. What can I do?

What happens?

Can not install the Window 7 on the Dimension E520.

This system should install Windows 7 without any issues.

Let us know what error messages you have if any while trying to install Windows 7 as its very hard to give advice without any additional information.

Also let us know how you are trying to install Windows 7, whether its the first time and whether you are installing from Windows or via the Dell BIOS.

For more information on installing Windows 7 see Windows Reinstallation Guide/A Clean install of Windows 7:

http://dellwindowsreinstallationguide.com/

It may also help to run the extended Dell F12 preboot diagnostics to check the hardware is okay before Windows 7 installation (page 290).