I've tried cd nvidia dir, no dice . reason, I'm trying to fix a nvlddmkm.sys error that won't let me start and makes my display all weird, I'm trying this method but stuck on the part where I have to access the nvidia directory ""I have found and fixed the problem today. This is what appears to happen. during the installation of the most current drivers 100.65 Vista, an OLD file nvlddmkm.sys is copied into windows/system32/drivers and not the current one in the install. As a result the new drivers are attempting to access a file dated 11/2006 instead of 2/2007 ver 7.15.11.0065 which is in the newest WHQL driver ver 100.65 vista 32. Fix: Go to windows/system32/drivers and rename nvlddmkm.sys to nvlddmkm.sys.old. Go to the nvidia directory and find the file nvlddmkm.sy_ and copy it to windows/system32. Using the cmd window (DOS box) type EXPAND.EXE nvlddmkm.sy_ nvlddmkm.sys. When the expansion is complete, copy the new nvlddmkm.sys to windows/system32/drivers and restart the computer. Your computer should now work properly. You will notice that any uninstall and reinstall of nvidia drivers will not remove the old nvlddmkm.sys file and will not overwrite it with the newer version. You have to do it manually. I do not know why this happens but who cares as long it is fixed.""