OK, try this:
- Start Windows Explorer
- Plug the camera into the computer and turn it on
- You should see an additional drive appear in Windows Explorer - probably D, E or F
- EITHER Go through the new drive folder by folder (there shouldn't be many) and see if you can see any CR2 files or files with a type of Canon RAW or something similar OR right click on the new drive, select Search, and put *.CR2 in
- When you find some files start DPP and browse to the folder you were just looked in, hopefully you'll be able to see them and open them