If you get a picture file which you can't open then give IrfanView a try.

IrfanView is a very fast FREEWARE (for non-commercial use)
32-Bit graphic viewer and converter for Windoze 9x/ME, WinNT, Win2000 and Windows XP.

http://www.irfanview.com/english.htm

TUCOWS Worldwide Network - download IrfanView

TUCOWS Worldwide Network - download IrfanView plugins