To make System Properties dialog box look like Windows 7 one, visit following tutorial:
You'll need to replace existing sysdm.cpl file present in %windir%\System32\ directory with this downloaded one. (Here "%windir%\ represents "C:\Windows" directory if your Windows is installed in C: drive). You can use "Replacer" to replace the file.
Also make sure to take the backup of original file before replacing it.
