Windows Media Player 11 is really a huge improvement over Windows Media Player 10. Managing your library is made easier by using graphics all over around. It existed already longer for Windows Vista, but now it has also been leaked for Windows XP.

There is a WGA check on installation, but there are several workarounds. Here is one that i found myself and worked very good:
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WGA workaround: WinRAR needed!
-Extract installer (mpsetup.exe)
-run wmp11.exe in folder (not setup_wm.exe)
-restart your pc,
-run three other exe's in extracted folder (not setup_wm.exe)
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Test if it works, if not: do this:
-Rename wmplayer.exe in C:Program FilesWindows Media Player to something else,
-Extract wmp11.exe (already in your first extracted folder), and
-copy wmplayer.exe from that folder to your program files folder

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