I have been running Windows 7 64 Bit, for a while now. Ever since sp1 update I had errors and blue screens left and right literally. I did a clean install without sp1 this time, and still had many errors and blue screens. Just recently I switched over to 32 Bit. The difference between 64 bit and 32 bit, is that the "Nvidia-system- nforce memory controller" was a update in 32 bit, and not a update in 64 bit. I did not install the memory controller, and so far, all is well. The install from start to finish was alot smoother. Programs don't seem like they're locking up, and just sluggish as 64 bit was. My question however is, Where is that update in 64 bit- (Nvidia-system- nforce memory controller)?