F18 nvidia crashing. . . .oops. . .

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http://forums.fedoraforum.org – I installed F18 without any hitch so I thought today along with a ton of software and all of the updates in the repositories including rpmfusion. I installed nvidia via 'Easylife' and everything seemed fine. But now my system has been crashing after it boots up, right after when I enter into the login screen and then it happens. . . the system sits there for about 45 seconds trying to make up it's mind about what it's trying to do .then I get the crash with the oops message saying something has gone wrong. . . . Where do I go from here? The card is a Nvidia Geforce 550ti and everything worke (HowTos)