This has fixed just about every jpeg problem I've ever run into; download it to the desktop and then double click to merge to the registry (confirm when prompted). Afterwards you can simply delete it.
http://www3.sympatico.ca/one.human/r...JPG_IE_fix.reg
I believe you will get the bmps back simply by associating it with MSPaint if that is what you want to use to open it.
By the way IrfanView, if you don't happen to have it, is an excellent freeware image viewer/editor which does a lot else besides. You don't need to associate any file types with it to use it. I find it particularly handy for capturing and saving screen shots, such as the one I posted. You might want to check it out when you get the chance.
http://www.irfanview.com/