Who to us this 18xoptical zoom 500xDigital zoom camera

The issue you are describing with your Olympus Zoom Accura 105 camera sounds like a problem with the zoom mechanism. When the camera is zoomed in, it is unable to take a photo and becomes unresponsive. However, when the camera is not zoomed, it takes photos without issue.
To troubleshoot the problem, here are a few things you can try:

• Make sure that the lens is properly attached and tightened.
• Try cleaning the lens, both the front and rear elements, with a lens cleaning solution and a microfiber cloth.
• Check the battery and make sure it is fully charged.
• Try using a different memory card.
• Make sure that the camera firmware is up to date.
• If the above steps do not resolve the issue, it may be best to contact Olympus customer support for further assistance. They will be able to diagnose and fix the issue or tell you if a repair is needed.

It is also possible that the issue is with the camera's zoom motor and it could be a hardware problem that would require getting it repaired by a professional.

The photo is saved to the SD card automatically by the camera

How zoom camera for galaxy ace2 GT-I8160? when i take photo can't zoom?

Grab it here

On the rear of your camera to the top right is a mode selector dial. To the right of this there is a vertical rocker switch, press the top half to zoom in and the bottom half to zoom out.

Note that this model is extremely basic and crude. The zoom is only a digital zoom, not an optical one: this means that every time you zoom all that's happening is the camera magnifies the image and effectively reduces it's resolution dramatically from the maximum 5.1MP. You can reduce the loss of quality by using the mode selector to go into set up mode and then setting the photo quality to "High Quality" (two stars). You'll still lose the same number of megapixels when zooming, but the data compression on your photos will be lower than when using standard quality settings. By far the best way to use your camera is to never use the digital zoom at all; leave it set fully to "wide" and if you need to zoom just crop the image afterwards on your computer.

Your camera is better than nothing, but even a basic 2MP camera built into a mobile phone will usually take better pictures.

If you'd like to know more about your camera then you can download the user manual here, courtesy of Retrevo.

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Night photos and full zoom will cause your camera to choose a long shutter speed. You need to use a tripod for those pictures.

you need to turn the digital zoom off, or change your zoom to optical zoom

The resolution of the photo you take determines how grain shows up as you zoom into the Photo, So taking a 10 megapixel photo on optical zoom or no zoom will give you a sharper picture than when you use both the optical and digital zoom to grab your picture. The digital zoom uses the centre of your CCD picture imager rather than the whole CCD so with less elements to your picture when you take it gives you blockiness sooner when you zoom in on the image. I am guessing your friend has digital Zoom turned off in settings to prevent the Graining showing upon magnification. Good light and a steady camera will give you the best results.

the only option really for it is service. you do have a 1 year warranty so long as you have a receipt / warranty card. you could just play with the zoom lever a little to see if it frees up

You can't. The inphoto digital zoom is just so you can do it. The best thing to do is download the photo to your computer and then use the camera software to zoom/crop etc. Then you can save the altered image.