Change has been made immensely to Windows 7 taskbar. To differentiate to the previous OS Windows such as XP and Vista, in Windows 7 you’ll find bigger icons and other additional features like Taskbar Thumbnail preview, Jump List and also Aero Peak. And among all of them, Windows 7 taskbar is a prominent change and apparently one of useful changes for this latest OS version for some Windows users is the taskbar itself and to be expected the same look of taskbar and same size of icons added to Windows XP and Vista.
Officially Microsoft doesn’t grant the request so sbar.codeplex.com has came up to the stage replacing Microsoft role to meet some Windows users expectation, by releasing a tool, the tool I am talking about is Sbar Taskbar Replacement. this tool will add some new functionality present in Windows 7 to older Microsoft operating.
Sbar Taskbar Replacement’s ScreenShot:

Click this link to: Download Sbar Taskbar Replacement.
Originally from: Sbar Taskbar Replaces Windows XP & Vista To Taskbar Windows 7.
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This program causes problems in Vista that can not be corrected even after uninstalling. DO NOT USE THIS PROGRAM.
If you use vista, (and the program causes extreme problems or undesirable effects) you can simply use a system restore. I installed a bad seven packet [stupidly], and it didn’t work, nor installed. Just click start > type: system restore > click restore. It will restart your computer within 4 minutes or so and voila!