f.lux is a wonderful tool, unfortunately I have found it incompatible with my nVidia graphics card, a GE Force 7100 GS, in Win 7 Pro 64: specifically, I cannot adjust contrast or brightness in the nVidia TaskBar application without over-riding f.lux settings, and within f.lux, you have a very limited range of adjusting contrast or brightness. This may be more problematic for me because I am using a large 32 inch, LCD tv/monitor (not full 1080p, native resolution 1366x768), driven by HDMI ? I have to continually adjust the contrast and brightness settings depending on the application I am running, whether I am watching on-line video, watching a DVD movie, etc. You can be sure that I have varied every aspect of the monitor's internal setting possible before concluding there was no "happy medium" where its high luminance could be "toned down," without sacrificing readability. I would assume f.lux does not work with other similar lower-end nVidia cards, but I am not sure. I cannot remember if I sent an e-mail to f.lux about this, or not. Since it has been over six weeks since I last tried f.lux, and nVidia's driver has been updated, I should re-test. Hope f.lux works for you: its interface is so nicely designed ! best, Bill
~ Confused by Windows 8 ? This may help: [^] !