How to change the default font in Windows 8?

I want to know if there's a way of changing the default font on my HP laptop running Windows 8 release preview? I really want to change it to Roboto, as I did on my iPhone.
Please and thank you very much.

Here is the help forum for Windows 8 beta testers (like yourself) who have issues and need feedback on this test program you have.

http://answers.microsoft.com/...s_8?auth=1

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