Canon Japan has published a Windows 8 compatibility chart for their DSLR cameras and software. I am holding off upgrading my computers to Windows 8 but for those who already have this operating system, make sure you check the chart below.
Windows 8 connection check result by Japanese version (32bit/64bit)
o : Connection possible
*When using the EOS Utility 2.12.0, you will need to download and install ". NET Framework 3.5". For more information, click here to read the translated version of the notice from Canon Japan.
x : This is non-compliant.
* 1 When using the EOS Utility 2.12.0, you will need to download and install ". NET Framework 3.5". In an environment where ". NET Framework 3.5" is not installed, EOS Utility We will not start.
* 2 To automatically start the EOS Utility 2.12.0, you must set up the Windows 8 "Auto-Play" feature. Set up information here.