BSOD on start up and safemode

i get the message nvsmu.sys page fault in nonpaged area. The last thing I did was browse the internet last nite. In the past few days I've downloaded a new driver for Vid card, download a windows update and I think thats it. I run Avira, super anti spy ware and Mbytes. I recently installed about 1 1/2 weeks ago a another new HD. I'm running windows 7 ULT 64bit. I have a 9600gt Nvidia. I've ran windows mem check as i cant get into system and it came u with nothing. Any ideas? Thanks

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