Your CD is for an older version of Windows and the installers/drivers have changed over time. The driver you need is part of the Windows 7 OS so you should be able to just connect the camera to the computer using the appropriate USB cable.
The software update for the ZoomBrowser EX is available here: http://software.canon-europe.com/products/0000484.asp
if you need. Use the drop-down menu to select Windows 7. Download and save the file. Then launch the updater (double-click) and insert your CD in the optical drive of the computer. Then follow the on-screen directions to install the ZoomBrowser EX version for Win7.
You can import from the camera with Paint (File > Import from Camera or Scanner) and PhotoGallery (if you have the Windows Live package installed)
I hope this helps.