It appears I am infected with some type of virus that at this point appears to have only infected my .jpg files located on my "C" drive. All .tiff, .psd files appear to be fine and my second internal drive "D" has no infection at all. When I look at a folder containing photos all .jpg files have this message, writtrn in white letters on a black background " ASK GOOGLE W32:PEMILU2009" FIND OUT HOW TO GET YOUR PICTURES BACK" I run avast and with the help of the folks on their forum tried using a program called "FireEye" Decrypter but had no success. Other than the obvious problem my PC seems to be running fine.
I run XP Pro, have scanned with MalwareBytes and Avast (free) and would appreciate any and all help you could provide.