Windows XP marks the biggest change to the Windows OS since the advent of Windows 95. It combines the stability of the NT/2000 operating system with the user-friendliness and hardware support of the consumer Windows line—and it does so literally, because those two operating systems have been combined for the first time in XP. Although there are two versions of XP—Home Edition and Professional Edition—the differences between them are relatively minor and have to do primarily with security and administrator tools. Under the hood, they're the same OS.
XP marks several other change as well. DOS is no longer a part of the underlying OS, although it's still available as a command prompt. Multimedia and graphics have been built into the operating system more directly than before and are no longer treated as an afterthought. And, cosmetically, XP has been given a makeover, in both the way it looks (rounded windows and almost cartoonish at times) and the way it works.
Whether you want to speed up your PC, customize XP's interface, hack your wired and wireless network, get more out of the Web, make better use of email, use the Registry to bend the operating system to your will, or use XP for countless other useful tasks, you'll find what you're looking for here, but you have to reply here...what you like and not, so that I know what I am posting is really beneficial for someone.