Information about scheduled / unscheduled sleeps and reboots should be found by expanding the tree view in the left plan to Event Viewer > Windows Logs > System. Here's a Command Prompt example (uses PowerShell): powershell -command '(Get-WmiObject Win32_OperatingSystem).LastBootUpTime' To open a command prompt, click Start, click All Programs, click Accessories and then click Command Prompt. System will go into sleep mode ONLY when scheduled in system Power Options under Control Panel. (gcim Win32_OperatingSystem).LastBootUpTime of 2 - Windows 7 (64 bit) Doesn't Go To Sleep - posted in Windows 7: Running Windows 7 64 bit. Here's a PowerShell example: (Get-WmiObject Win32_OperatingSystem).LastBootUpTime All modern operating systems have had the ability to put your components to sleep and to even power down the computer itself after a certain period of inactivity. WScript.Echo objDateTime.GetVarDate ' Example: 12:16:22 PM That’s rather retro of you, though not as bad as if you’d have asked me about Windows XP, I suppose. I lock the computer (ctrl-alt-del) at the end of the day, and I turn off the external monitor power button. I have the power settings set to NEVER sleep. My Windows 7 Pro laptop goes to sleep by itself. Set OS = wmiService.ExecQuery('SELECT * FROM Win32_OperatingSystem').ItemIndex(0) Windows 7 laptop goes to sleep by itself. Set objDateTime = CreateObject('WbemScripting.SWbemDateTime') Set wmiService = GetObject('winmgmts://localhost/root/cimv2') Note that the returned date is in WMI date time format which you'll need to use tools to convert into a human readable date. You can also get the last boot time by using the WMI service object to query the LastBootUpTime property of the Win32_OperatingSystem class. To open a command prompt, click Start, click All Programs, click Accessories and then click Command Prompt.

Have you consulted Event Viewer? To start Event Viewer by using a command line

Windows 7 goes to sleep