Photoshop diplays all images with desaturated colors (Images look fine when opened in other apps)
All of a sudden, when I open any image in Photoshop, the colors appear to be desaturated...In Photoshop only. When I open that same image in Window Picture Viewer, or Quicktimer, or even if I drag the image into a brower window, the colors appear fine. But in Photoshop, something is clearly wrong. Now, I can make color adjustments to the image, but when I save and reopen reopen it in another application, I can see that color changes have been made, but they still don't match what Photoshop is displaying.
The images are RGB image...I've checked the color space setings in Photoshop, and they are the default (Edit > Color Settings: North American General Purpose 2 / RGB: sRGB IEC61966-2.1 / CMYK: US Web Coated (SWOP) V2, etc, etc). I also made sure View > Proof Setup was set to: Working CMYK. I even reset Photoshop to it's default settings (by holding down CTRL-ALT-SHIFT on launching Photoshop)...But the images still appear desaturated when I open them in Photoshop...So, I don't understand how this is still a Photoshop problem...But then again, they look fine when I use any other application on my computer to open them, so it's clearly not an issue with my monitor.
The frustrating thing is, I haven't made any changes to Photoshop OR my monitor (that I know about)...Photoshop has worked perfectly for me for years, and now there's this SNAFU that I just can not figure out.
Any suggestions?
I've included a screenshot below to show the disparity between an image opened in Photoshop (on left) and Windows Picture Viewer (on right):

Photoshop image on left, with desaturated colors...Same image in Windows Picture Viewer on right, where colors appear normal.
Any and all help is much appreciated : )
Best,
-Austin
