Windows Photo Viewer - Yellow?

AH HA!

It was all to do with colour profiles on the Samsung monitors.

This Microsoft article holds the solution: http://support.microsoft.com/kb/939395

(If you're using more than one monitor you'll need to set the profiles individually)

In case the link ever dies here are the instructions:

1. Click Start, type Color Management in the Start Search box, and then press ENTER.
2. In the Color Management dialog box, click to select the Use my settings for this device check box.
3. In the Profiles associated with this device list, click the color profile that you want to remove, and then click Remove.
4. Note If you receive a warning message, click Yes.
5. Click Close to close the Color Management dialog box.
6. Restart the computer.

The profile I used was sRGB IEC61966-2.1

In Windows 8, you don't need to restart.