Photos/Images Do not Display after saving

> After right clicking on an image...then save picture as...
> (available options are extensions (.art) and (.bmp).
> However most photos/images are in (.jpg)...after trying
> to save as either (.art) or (.bmp) the images will not
> show up.
>
> When trying to bring up the picture(s) it will
> read, "preview not available" or "there was a problem
> attempting to decompress '...' Make sure that this file
> is an actual image file.
>
> I have never had a problem with this before. This just
> started happening. Thank you in advance for any help.