I am going to buy a new laptop operating windows7

Your printers will work with Windows 7 right away -- the drivers for these two models are part of the Windows 7 package. You can download an 'add-on' module from Canon's web site that will give you the full features of the original drivers, basically the items on the 'Effects' tab in your current printer setup window.

Canon also has a Windows 7 driver for the 4400F scanner, but you will have to download that from Canon's web site here.

You can see Windows 7 compatibility information for Canon's consumer products here.