I upgraded to win7 home premium from vista home premium last Sunday. Today, I try to save a picture and my only choice is titled "unttitled.bmp". Even pictures that I've downloaded and saved before as, for example, 1234.jpg now want to be saved as untitled.bmp. The save as type box only lists .bmp as a choice. Is there some setting I may have changed to only allow me to save pictures as a .bmp? My computer is a Dell 531s with an amd athalon 2.3 4400+, 3g ram and 320 g sata hard drive. I did not have this issue before upgrading to win7. Thanks for all the help!

Mark