Jpeg artifacts are sort of a unique problem. The blocks, fringing, and other problems don't usually respond well to the standard noise removal filters. So people write jpeg fixer tools, with varying degrees of success. I recently tested a new one from Topaz Labs called Topaz DeJPEG. This tool is much better than anything else I've tried, and it is free.

http://www.topazlabs.com/index.html

They have some other tools there. I've been test driving their Topaz Vivacity, which includes several plugins for denoiseing, jpeg enhancement, enlarging, and sharpening. And of interest to photo-art folks, you can overboost some of the controls to create the foundation for some art effects.

Hi Andrew...thanks for the link i have just downloaded it and will now go and see what i can do with it...
Kind regards Patricia Kay

Thanks Andrew. Sounds promising and looks even more so on the website.

Janet

i tried Topaz Vivacity and i came up with some pretty intresting artwork(using Topaz Clean). I wish I can make more, but it stoped on me 30 days after i install it. Can someone please tell me the drowssap (read backwards) to it?