My Windows 7 desktop will not enter automatic or manual sleep. In both cases the computer does an "unsuccessful shutdown". I have to cycle power to reboot the computer. Restart and Shutdown work normally. I have enabled automatic sleep with both Power Options, powercfg, and BIOS. powercfg -energy reports no unusual errors rather than the usual USB devices not entering suspend state. I believe I have performed most of the steps outlined in the tutorial by Brink in the Vista forum "How to Troubleshoot a Vista or Windows7 Sleep Mode Problem".