Which netbook should I buy?windows xp,windows 7 or windows 8?

[Precision Greens]

Windows 7 is best because windows 8 has some problem
This mobile oriented approach to the future of the desktop hasn't been greeted with much love by the community or the press. Focusing on one (maybe two) tasks at a time dumbs down the entire user experience. Also, users find themselves constantly switching between the new Start screen and the classic Windows 7-ish desktop (which includes the taskbar, desktop, explorer and so forth). Here's an example of how annoying this is: Say, for example, you're checking on e-mail using Outlook 2010, which is a traditional desktop application and one of your contacts is asking for a specific document. The next obvious step is to launch a file search. The problem is: once you click on the Start orb or hit the WIN key to launch the search feature, the classic desktop disappears with a big swoosh and you're back on the new Start screen pictured above, since the Start menu search is now only available in the new Metro-style environment. You find the file, open it and with another swoosh it throws you back to the desktop.

The same happens when you switch between the built-in Metro apps (such as Twitter@ama or Socialite) and your classic desktop applications. In terms of raw productivity, it's a major pain point and a very noticeable UI break.

Many complaints also focused around the fact that the new UI is aimed at tablets and phones, which makes it utterly useless on desktops and laptops.