I'm gonna have to redo the original post a little. All the BIOS and Nvidia driver stuff is 100% legit, so basically 3/4th's the original post, but after just having done a fresh install of Win 7 yesterday, I've come to a few conclusions after experimenting with things.
I mentioned programs like Java in the original post that keep memory resident footprints and intercept calls for their use. Programs like this are highly invasive, they do not launch only when needed, they're in most cases just sitting there running 24/7 like an actual device driver and bring many of the same problems that a device driver can bring like latency due to the way they work.
I've never run with things like Java installed, partly because of the latency it adds (which several people have emailed me about noticing the same thing when you uninstall it), and partly because it's an enormous security vulnerability. Flash, on the other hand, is extremely hard to get away from.
After doing a fresh Windows install and experimenting some, I noticed I could get similar mouse latency by leaving every default Windows service active and uninstalling Flash, or, leaving Flash installed and disabling numerous Windows services. No matter what combinations of services I disabled while having Flash installed, I could not get as good cursor movement as just leaving every service on default and removing Flash.
The services part of the guide is really the equivalent of adjusting sensitivity without actually using mouse software to do it. Flash seems to be more of a negative influence on a system than I had estimated, but who would really be surprised about that from an Adobe product? I'll probably be running without flash now unless I can:
1) Find a web browser that's completely sandboxed, self contained, and portable that has Flash built into it. "Chrome portable" is the closest thing I could find so far, but I hear it's not really even a portable app, still writes to C: user folders, and probably still installs flash, just with no remove program option for it in task manager.
2) Figure out some way to do a portable install of flash that only launches when I tell it to for Youtube videos, etc, instead of just sitting there in memory 24/7 waiting to play advertisements immediately as a web page opens.