f17 cannot boot after update

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http://forums.fedoraforum.org – Hi! I am a linux noobie, so be gentle with me :D I have installed fedora 17 from a live usb, it worked fine operating from usb and it worked find upon installation. After installation the update manager popped up and said there is about 400mb of updates to install. I said ok and it did its thing, and when it was done it asked me to reboot so I did, and now it hangs after selecting fedora from the bootloader. It loops between failing to idle channel 1 and 2 indefinitely, while occasionally loading a very skewed/glitched desktop and then coming back to the screenshot I have attached. I (HowTos)