scrolling does not work???

Hello,

I bought a Dell Inspiron with the following specs and scrolling does not work.  This is immensely frustrating.  I have used macs for years and don't know the ins and outs of windows.  Any help is greatly appreciated.  Thank you,

      Inspiron 17R - 5720

• Processor: Intel Core 3rd Generation i5-3210M Processor (3MB cache, up to 2.9 GHz)
• Windows 8
• Dell Outlet Inspiron 17R - 5720 Laptop
• 1 TB 5400 RPM SATA Hard Drive
• 6GB DDR3 SDRAM at 1600MHz
• 8X Tray Load CD/DVD Burner (DVD+/-RW Drive)
• Intel HD Graphics 4000