Solved Windows Photo Viewer decreases bit depth, adds dither

Kasm279

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10:31 PM
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26
I'm not quite sure if this is a video card thing, but it's the best place I could find. I'm having this odd issue on Windows 7 Ultimate 64-bit on my desktop. Any images (JPG, ARW) viewed with it appear downsampled to a lower bit depth, however viewing them in Adobe Bridge or Photoshop is just fine. I have installed Microsoft's RAW codecs, but I doubt those are causing any problems. The same images are just fine when viewed with Windows Photo Viewer on my laptop, which is also running Windows 7 Ultimate, but 32-bit. My monitor bit depth is set correctly.
Photoshop on left, Windows Photo Viewer on right
9kcBVzW.jpg
 

My Computer My Computer

At a glance

Windows 7 Ultimate x642x Xeon E5345 (2.33GHz, 8M, 1333MHz FSB)8x4GB Kingston PC2-5300FGigabyte Radeon HD4850 1GB
Computer type
PC/Desktop
Computer Manufacturer/Model Number
Dell Precision 490
OS
Windows 7 Ultimate x64
CPU
2x Xeon E5345 (2.33GHz, 8M, 1333MHz FSB)
Motherboard
Dell/Foxconn GU083
Memory
8x4GB Kingston PC2-5300F
Graphics Card(s)
Gigabyte Radeon HD4850 1GB
Sound Card
Sound Blaster Audigy 2ZS
Monitor(s) Displays
HP w2207h
Screen Resolution
1680x1050
PSU
750W Dell OEM
Mouse
Razer DeathAdder 2013

My Computer My Computer

At a glance

Windows 7 Ultimate x642x Xeon E5345 (2.33GHz, 8M, 1333MHz FSB)8x4GB Kingston PC2-5300FGigabyte Radeon HD4850 1GB
Computer type
PC/Desktop
Computer Manufacturer/Model Number
Dell Precision 490
OS
Windows 7 Ultimate x64
CPU
2x Xeon E5345 (2.33GHz, 8M, 1333MHz FSB)
Motherboard
Dell/Foxconn GU083
Memory
8x4GB Kingston PC2-5300F
Graphics Card(s)
Gigabyte Radeon HD4850 1GB
Sound Card
Sound Blaster Audigy 2ZS
Monitor(s) Displays
HP w2207h
Screen Resolution
1680x1050
PSU
750W Dell OEM
Mouse
Razer DeathAdder 2013
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