Yes, it is Windows XP.
XP displayed a reduced taskbar interface.
Server 2008 R2 uses the standard start bar design by default.
It seems the design differs from what you expect. The image matches the layout found in Windows 7.
Server 2008 typically lacks Windows Media Player by default. (Maybe I'm mistaken)
Windows Server 2008
Probably not, mainly due to the media player.
You've switched your Windows 7 theme to the classic version, and it now appears exactly as it did before. This confirms it's still Windows 7.
It might not have been included by default, but a package was available since I used it in WS2008.
You're welcome.
I still believe it fits better with WS2008 since that’s the company we’re discussing.