"Windows Classic" is the name of the grey and blue style that has been in Windows since the release of Windows 95.
In its life, it has undergone one major change with Windows 2000. The grey and blue colors were made lighter and the default screen font was changed from Microsoft Sans Serif to Tahoma. This change was named "Windows Standard". The Windows 95 color set was included with Windows 2000 (and later versions of Windows, until Vista) named "Windows Classic".
With Windows 8, the Windows Classic style was removed along with Windows Basic and was replaced with Aero Lite.
Classic as it appears in Windows 95
Classic as it appears in Windows 2000
Classic as it appears in Windows 7
