I installed Windows 7 couple of days ago, and I just discovered it does not go to sleep. I have dual booting Windows XP on the same system, and did not have this problem with it. Here's the error report from powercfg -energy System Availability Requests:System Required Request The service has made a request to prevent the system from automatically entering sleep. Requesting Service CryptSvc USB Suspend:USB Device not Entering Suspend The USB device did not enter the Suspend state. Processor power management may be prevented if a USB device does not enter the Suspend state when not in use. Device Name USB Root Hub Host Controller ID PCI\VEN_10DE&DEV_03F1 Host Controller Location PCI bus 0, device 2, function 0 Device ID USB\VID_10DE&PID_03F1 Port Path There seem to be two problems both I cannot seem to solve! 1. The USB device prevents Windows 7 from sleeping. I have no device plugged in! I tried checking/unchecking "Allow computer to turn off", disabling it, but does not help. 2. CryptSvc requests not to go to sleep! I am not at all sure why - this is from a clean boot, I am running Command Prompt and Firefox. However, this should still not prevent suspend manually from start menu, right? I have been trying for couple of hours to solve these issues. Any help will be appreciated!