Download Microsoft Segoe UI Font from here
Unzip the downloaded archive and place the two .ttf files in your .fonts directory.
You can find it in your user folder. /home/$USERNAME/.fonts/
For example: /home/ruchi/.fonts
If the directory .fonts does not exist, create it.
Download Aero-clone theme
Download the Aero-clone theme from Gnome-look.org or here
Install the Beryl and GTK theme as usual
Download the nuoveXT-aero iconset
Download the nuoveXT-aero iconset from here
Change the gnome-panel size to 32px height.For this you need to Right-click on the gnome panel (the taskbar at the top of the screen) select properties
Change the size to 32 and click on close
Vista start-button screenlet
Download and install "Desktop Screenlets" and you can download from here
Install the "orb" screenlet (The orb screenlet is included in the .tar.gz from gnome-look.org) or from here .Place the orb screenlet above the main-menu button and lock the position.
If you want to make the experience complete download some Vista wallpapers for your desktop.
Install cursor to aero-drop
Download aero-drop (Aero Mouse Cursor with Drop Shadow) from here
Extract the archive and move the folder to ~/.icons/ .
Go to System---> Preferences---> Appearance---> Theme---> Customize---> Pointer---> aero-drop---> Close---> Close.
Then, go to ccsm (if you don't have it install it with "sudo apt-get install compizconfig-settings-manager").
General Options---> Cursor theme---> aero-drop
That's it you are ready for vista look for your ubuntu desktop