JPG Rotated in Windows

I shot a big show last night and for the first time ever I used JPG instead of Raw. I have my 1D3 set up to auto rotate pictures in the computer but not the thumbs in the camera so I can see the pics in full view in LCD.

Weird thing is, the JPGs show up in Windows 7 explorer not rotated too (like in my LCD) so all the portrait shots are sideways, same of course in the Windows Photo Viewer.

Adobe Bridge and PS are smart enough to know the orientation. Is there an easy way to flip the all in Windows explorer (I love using that to sort the pictures, it's the easiest by far).

Well, I just looked on my Win7 64 laptop at some jpegs -- I right-clicked and there is a Rotate Clockwise/Counterclock​wise function

select all the pics you want to rotate using Ctrl meanwhile.
ALL OF THEM . Once you have all selected, as "tonylong" said, click right mouse and rotate as you desired. And, obviously, wait for ...(depending on your processor's speed)

LOL ok easy peasy! I guess I was so stressed from shooting this weekend I overlooked the obvious! LOL!