using XP
Pause the file on the image you want, then mash on "Print Screen", on the top row right next to F12. It's in memory now, so you can open it with any image program. Open Paint, then click Edit, then click Paste, and there it is. Save it with whatever name, of course.
I see XP handles .png's now, which is my favorite. It's lossless, and it's akin to a zip program, which means it'll use less space than a similar .bmp