Larger image and take off noise, pixel dust, blur

[aquarius]

Heya, friends!

I'm newbie in graphics, so the problem is: I've got an image (495*500) of not perfect quality. I need to make it ~ twice bigger and take off the undesirable stuff, that appears, when the image is larger - pixel dirt, dust, noise, blur, bad color and other such.....

Please, if someone knows - help me!

Thanx in advance.

[catia]

If you post the example image, we can have a better shot at advising you.

Catia