Canon A1100 IS lens will not retract

I purchased a Canon A1100 two weeks ago and I just started receiving a lens error and the lens will not retract. I have changed the batteries.

If you changed the batteries but those batteries are underpowered, it could cause lens issues. But I'm confused. You changed the Lithium Ion battery that came with it? Did you get the same battery that Canon recommends? If you didn't, that's your problem.

But also, try cycling your camera on/off five or six times. It may be that the lens was jarred last time you used it and it came out of alignment. Cycling the camera on/off will get the lens moving and it may work it's way back into alignment. Here's another solution that the Canon website recommends - Solution
Check the following when you operate the camera to avoid applying pressure to the lens and surrounding area:

* Hold the camera so that your fingers do not touch the lens unit when you are shooting.
* Make sure the camera is off before the camera is placed back in the case. Exercise caution to ensure that the camera does not accidentally power on while the camera is stored inside the case.

If you cannot clear the error code by turning the camera off and then on again, or if the error code is displayed frequently, a camera malfunction may have occurred.

But if that doesn't cut it, then a repair is in order and you should get it in while your warranty is in force.