Hi, I've been having troubles with my video card since 4 months ago or so, the problem is that I had Windows XP SP3 (32 bits) and everything was perfect, then microsoft launched Windows 7 Ultimate (64 bits) and I bought it and installed it, the first days were perfect but then when I tried to play Bioshock I got the nvlddmkm.sys error -.-. I tried a lot of ways to "fix" this error but I couldn´t, at first I could use the driver as long as I never played anything but then one day when I was booting windows I got the error and then the driver never ran again, not ever installing other versions (I used Driver Sweeper), tired of this I went back to Windows XP to find that now my video card also had troubles with Windows XP drivers as well, then I reinstalled Windows 7 but I simply can´t use the driver, windows keeps telling me the error code 43, I don´t know what to do.

Well I've been thinking on that too but if that's true then I shouldn't be able to see anything with my video card isn't it?, and besides the driver problem I still get video from it :S

well I could use the driver this evening and I could set the underclock that some people said that could fix the problem

450------- GPU Clock
440------- Memoria
1000------ Shader

Everything was fine but the I got the error nvlddmkm.sys again like an hour ago while I was using iTunes so I'm it might be a hardware problem, still I would like to know if this error means a card problem or if could be something else.