Can you reset a digital camera to factory settings?

Although Nikon cameras can be set back to the factory settings in several steps, I can't find anything in the Canon manuals, that says how to reset the camera or to put it back in the factory settings.
Perhaps you did change the firmware once. Most of the time there is a descriptions, how to do that and what to do if things go wrong. This could be something to reset the camera.

"Reset file No." is the reset for the numbering system on your file folders only. You want to use just "Reset" which will reset the entire camera back to factory settings.

Remove the battery for 20 mins. Then replace the battery and go to the camera's Menu setting and set the date & time.

In order to reset the camera settings to its default values you need to do the following:

-Press the MENU button
-Use the left or right arrow keys to select the Settings menu (its icon looks like a wrench and hammer)
-Use the up or down arrow keys to scroll to the choice that says "Reset ALL..."
-Press the "Func./Set" button to confirm your choice.

This will reset the camera to its factory default settings.

To reset the camera - have the camera in shooting mode - go to Menu - left arrow to reset - press ok - Highlight yes and press ok. This will set the camera back to factory default settings. Hopefully this should solve the issue.

It's possible that some of the settings are set improperly on the camera. Try resetting the camera back to factory default settings and see if this makes any difference. To reset the camera - have the camera in shooting mode - go to Menu - left arrow to RESET - press Ok - highlight Yes and press Ok. This will set the camera back to factory settings. Try to take some images and see if they are still fuzzy.

Go to camera Menu and select Initialize, this will Reset your camera to factory default settings.

Put camera dial on P - go to Menu - camera 1 tab is highlighted - right arrow over to card setup - down arrow to custom reset setting - right arrow to reset and press ok - you will see reset yes or no - highlight yes and press ok - camera should now be in factory default settings

reset the factory settings...and replace the cells.....sud be wrking fyn after resetting to default factory settings..

If you go into the "set-up" menu you should find an option which allows you to reset all the settings back to factory original.