Haha, I just figured it out while I was upstairs, I had changed my power management plan in Windows 7 from balanced to high performance. So went back disabled c1e, enabled the c3 etc, booted back into windows and adjusted my power plan. Everything works now, thanks for helping euonline.
*Edit*
I played with the c state options more, just disabling c1e and leaving c3/c6/c7 disabled works too. Its only c1e when it is enabled that is causing the squealing.
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