Theme always returning back to classic

[networkmancer]

Recently when I run windows 7 I have normal aero theme but now I cant adjust my theme. Maybe my cousin is the last person use this computer but he is booting win xp and not 7.. If I will choose aero theme it will still return back to Windows classic( Windows 98 theme) . I did run Aero Troubleshooter and check all in the System Properties -> Performance Settings-> Visual Effects. But still getting the old Classic theme. Any help there? I have no restore point btw. If someone also can give me the original Aero theme in file:///C:/Windows/Resources/Themes/Aero . I remember overwriting this files.

 

[Arc]

Wanted This ?

This is the original aero theme copied from my machine.