You can find a noise reduction tool in Photoshop Elements. Choose Filter, Noise, Reduce Noise.

That said, you'll get better results with a program that's designed specifically to eliminate noise. My favorites--and ones I've recommended many times before--are and .

There's a free version of Noiseware called Noiseware Community Edition, which is a great starter tool, but be aware that the program limits your photos to a JPEG quality level of 90 percent. Give it a shot, and if you like it, purchase the commercial version of Noiseware for about $50.

I like Noise Ninja even more, and in fact Noise Ninja is considered the gold standard by many photographers. It is built into the new, excellent Corel AfterShot Pro photo editing program, in fact. A Noise Ninja license costs about $35 and lets you apply a custom noise profile to your photos based on your specific camera, so it can remove noise in an extremely accurate and detailed way. If you shoot a lot of high ISO photos, definitely check out Noise Ninja.