http://www.microsoft.com/whdc/hcl/search.mspx. This site is the home of the Microsoft Windows Hardware Compatibility List. This list can be used to see if your hardware is compatible with a specific Microsoft operating system.
http://windowsupdate.microsoft.com/. You should keep your Windows operating system up to date with the most recent Microsoft updates and security patches. This can be accomplished from this Microsoft Windows Update site.
http://www.Microsoft.com. It is suggested that you visit the Microsoft.com Web site and sharpen up on as many operating systems white pages as possible before taking the A+ Operating Systems Technologies exam.