Problem:
The Windows command “rundll32 powrprof.dll, Set SuspendState Standby” might not put your computer in to sleep mode depending on firmware, BIOS, etc. Or, it might just put your computer into Hibernate mode.
To see what power states are supported by your computer, enter “powercfg /?” into a Command Prompt window.
Solution:
PsShutdown is a command-line utility similar to the shutdown utility from the Windows 2000 Resource Kit, but with the ability to do much more. In addition to supporting the same options for shutting down or rebooting the local or a remote computer, PsShutdown can logoff the console user or lock the console (locking requires Windows 2000 or higher). PsShutdown requires no manual installation of client software.
Just copy PsShutdown onto your executable path, and type psshutdown with command-line options defined below.
See this article for additional information on PsShutdown.
Download PsTools (2.7 MB)