no JPEG in my PS suddenly

I have several versions of PS on my computer and I recently downloaded the 30 day demo for CS6, I bounce back and forth because some have different working actions than others due to compatibility issues. So I have been bopping along the last few days on my cs5 64 bit, and today I ran into a problem. First I want to say that I also noticed some changes in Windows 7 , a change in font color for files that have not been opened for a while. In CS5 when I use SAVE AS for a file that was PSD my only jpeg option is something new and Window 7 can't open it. It is JPC 2000 without any plain old jpeg choices in it. Any ideas what happened or how to get the old JPEGs I used to able to select?