one that doesn't have everything and includes a EULA term that says it may NOT be used for commercial purposes or in a commercial way or used for a charitable organisation. Section 6 applies here.

And don't forget that the Surface RT has a nice piece of spyware that reports back to MS each month and can NOT be turned off. That's all in the MS EULA on the Surface RT; section 5 paragraphs d, k, and m