Windows 7: Problem in installing windows 7 using a usb

hi,i have got a laptop in gift,ubuntu is installed in it and i am not sure how to install windows 7 ,i ve been using windows on my desktop computer and i want it in my laptop as well,can any body guide me through simple steps to install windows 7 inplace of ubuntu using a usb(as i have it it)

Boot from the USB
Click Install Now
Accept License Agreement
When the option is displayed to select an installation type, click (Custom Advanced)
Click Drive Options
Select each drive/s click Delete (this will delete the existence of Ubuntu and Grub on the computer)
Click New
Click Apply
Click OK
Click Format and click Next to proceed with the installation

This process assumes you are trying to replace the OS, not dual boot.

HTH

Illustrated steps here to Clean Install Windows 7.

Be sure to boot the installer, use Custom>Drive options to delete all partitions, then just click Next for installer to create and format your Install partition and begin install.

thankx