Primary Operating System: Ubuntu 10.04 64 bit with pulseaudio stripped, this operating system is used the most because it and it's available tools handle most of my stuff better than Windows
Secondary Operating System: Windows 8 Developer Preview 64 bit, mostly just screwing around with this and run only a few games under it, the rest is done under Linux
Overall I have a pretty standard setup that will soon be seeing a GPU upgrade.
EDIT: btw your UT install looks like shit :P
http://ompldr.org/vZjM3MQ
http://ompldr.org/vZjM3Mg
http://ompldr.org/vZjM3Mw
http://ompldr.org/vZjM3NA
http://ompldr.org/vZjM3NQ
http://ompldr.org/vZjM3Ng
http://ompldr.org/vZjM3OA
Frame rate capped at 200