I use Yahoo email. How do I get Windows Pic viewer to open it instead of Jasc Paint?

If you mean photo attachments, find an image of the file format you want to open with the Windows previewer already on your hard drive.





Right click it, click "Open With", and in that menu, select "Choose Program", then select "Windows Picture and Fax Viewer." Make sure "Always use this program" is checked.





Now your computer will always use Windows Picture and Fax Viewer to open whatever file format you did this with (.gif, .jpg, etc.)