Canon PowerShot S1 IS User Manual (en)

When the installation is over, select 
[Yes, I want to restart my computer 
now.] and click [Finish].
Remove the disk from the CD-ROM drive when your 
normal desktop screen appears after restarting.
This concludes the software installation. 
Continue by connecting the camera to the computer so 
that the USB driver can be utilized. 
Users of Windows XP and Windows 2000 must log in as an Administrator 
(computer system administrator) after restarting to carry out the 
subsequent procedures. 
If you installed a USB driver, so far the required files have only been 
copied to your computer. You must now connect the camera to the 
computer with the interface cable to complete the installation and 
prepare the driver for use. 
See Uninstalling the Software (p. 79) to delete the installed programs.