While the N455 supports 64-bit architecture, Intel never released a 64-bit graphics driver for the GMA 3150. If you install a 64-bit OS, you will be stuck with the "Microsoft Basic Display Adapter," which lacks hardware acceleration. 2. Windows Update
The driver is required for basic system communication. If your manufacturer's site doesn't have it, you can sometimes find compatible files through Dell Support for similar Atom-based systems. How to Install & Identify Missing Drivers intel r atom tm cpu n455 - 1.66ghz drivers