Since Windows doesn't use Xorg you won't find it.
You may be able to get it working with Xming or cygwin.

When I had my N800 I did get Synergy installed on it and that will work in Windows.

But, the best thing would most likely be to just upgrade to Linux. It's free and easy and will fix most your software headaches. You already have it on you phone, why not your Desktop.