Canon software for EOS camera Downloading updates You can download Canon software from: Canon USA and/or from Canon Europe site -to name two of them. Installing updates issue The problem is, there are updates only -so original software (from CD) is requested to be installed first. I see at least two cases where this can be a problem: 1. You bought your camera second hand -without original CD, 2. Installing "old" software just because updating, well... Installing update without having original installed All those updates are actually full applications. Without going into "where & how", here's the procedure: Prepare for installing update 1. Open Notepad and write (or copy/paste into Notepad): Windows Registry Editor Version 5.00 [HKEY_LOCAL_MACHINE\SOFTWARE\Canon\EOS Utility] [HKEY_LOCAL_MACHINE\SOFTWARE\Canon\DPP] [HKEY_LOCAL_MACHINE\SOFTWARE\Canon\ZoomBrowser EX] [HKEY_LOCAL_MACHINE\SOFTWARE\Canon\PhotoStitch] 2.Now save that (as CanonUpdate for example) -where txt extension will be added automatically 3.Rename CanonUpdate.txt into CanonUpdate.reg 4.Now right-click onto CanonUpdate.reg file and select Merge option 5.You'll be asked if you wish to add into Registry -where you choose Yes (of course) 6.Now you're ready to install any update, without having original installed. Example for Windows7 64-bit: Windows Registry Editor Version 5.00 [HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Canon\DPP]