When looking for a computer that meets or exceeds the requirements needed for taking online classes you would want to look for a system that meets or exceeds the following:

Required Recommended
Operating System Windows 2000, 2003, XP, Vista, Windows 7, Windows 8

Mac OSX 10.6 or newer
Windows 7 or Windows 8
Video SVGA Monitor
Minimum resolution of 800 x 600
Resolution of 1024 x 768 or greater
Internet Speed Dial-up or better High-speed Internet. (i.e., cable, DSL, etc...)
Java Script Enabled Enabled
Cookies Enabled Enabled