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Running Windows XP I am finding that printScreen button only captures a black and white image of the full screen but color for just one window (Alt-PrintScreen).

Is there a limit to how much memory can be used for the image that I am hitting here? My screen is huge 2560x1600 pixels, so maybe it drops depth to 1 bit to save memory.

If true, is there a way around this limitation?

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Maybe paste it into a different imaging program? Irfanview is great at handling screenshots and all types of images. If it's still broken, then you know it's not your image viewer/editor. – Iain Jan 27 '10 at 0:41
    
I'm using Adobe Photoshop, but pasting into Microsoft Paint has the same issue. – WilliamKF Jan 27 '10 at 17:44
    
But only after Photoshop has been launched once since booting. – WilliamKF Mar 26 '10 at 21:19
up vote 0 down vote accepted

Seems it was some corruption introduced by some combination of Adobe Photoshop CS4 and the nVidia graphics drivers.

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Rebooting and not launching Photoshop after boot and all works fine, once Photoshop is launched, the weirdness starts. – WilliamKF Mar 26 '10 at 21:19

I experienced the same issue on my Windows 7 machine. For me, it was due to a remote desktop session I had open to an old windows server. The remote desktop window was minimised, but it was still interfering with screen shots taken on my desktop.

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