Lens making strange clicking noise when turned on or zoomed in.

From the way you describe the problem it appears that the retraction mechanism has become out of line. I think that as you can hear a clicking sound the mechanism is working but not engaging with the lens. Try gently applying slight pressure on the front of the lens this may help to re-engage. You may need to consider a trip to the repair shop.

Start using a card reader instead of your camera.

This camera has an auto lens. Which means it will focus automaticly evey sec. you can turn this option off:
1: Go into the menu
2: Chose option Cam Setiings
3: Swich AUTO focus to single lens and click OK.

Try these procedures.

Hi,
Try this link
http://www.vista4beginners.com/Import-pictures-from-your-digital-camera
pls rate my suggestion.....

The flash circuit is defective. As it's only a couple weeks old, recommend just exchanging it for another from your place of purchase. You shouldn't be attempting repair while its under warranty.

Looks like the lens is "out of alignment". Canon charges heftily for this repair. However if the lens is not broken then many people have got it working through systematic bashing. Click here to view the thread

Manually rotating sensor rotor inside camera and cleaning gear fixed the Canon "lens error" for me.  
I placed instructions with photo's here: http://www.avh.dds.nl/Fix-Canon-SD600-Lens-Error/

Most often these problems occur because of shocks received by the camera. The zoom mechanism in the lens assembly gets knocked out of place. Sometimes this happens just like that, without any clear reason. The lens assembly is a delicate mechanism if one small part gets out of the place it will damage or jam the whole mechanism. A service center can check for that. There is no way for the end user to proper realign the lens mechanism because it is sooo small. It requires specialised tools and hardware. Also, when you take the camera to a service, ask them an estimate of the repair, you will know if it is worth it. Repairs vary form a simple lens adjustment to the need of having the whole lens assembly replaced