If you have the XP install disk available, drop it in the CD drive and reboot the computer. Before you do, make sure you copy anything you want to save to a floppy disk, a CD or a secondary drive...
If you have had your computer since Windows 95 then it probably does not have processor speed and RAM that will give you an acceptable experience if you install Windows XP on it. If you want to try...
The two operating systems are not compatible with each other. There were so many errors in Windows ME that the system cannot be simply upgraded by over writing the program. Windows XP Home Addition...
Neither is "better" or "worse" per se. They are virtually identical in device drivers, program support, and general functionality. Windows XP Professional includes a few additional features intended...