I was looking at Win32_OperatingSystem today and noticed that the last boot up time wasn’t right
PS> Get-CimInstance -ClassName Win32_OperatingSystem | select LastBootUpTime
LastBootUpTime
————–
17/08/2012 10:02:11
17 August isn’t right as I know I did a cold start this morning – or at least I think I did!
Windows 8 starts up much faster than Windows 7
Looking at the System event log the last but one entry last night was event id 64 – “The system is entering sleep.”
Looks like using the Shutdown option from Settings – Power only puts the machine to sleep.
I tried using the PowerShell stop-computer cmdlet.
Shutdown took longer than usual.
I found an entry in the system log stating
“The kernel power manager has initiated a shutdown transition.”
Startup then took much longer than usual
PS> Get-CimInstance -ClassName Win32_OperatingSystem | select LastBootUpTime
LastBootUpTime
————–
02/09/2012 19:27:41
So looks like use the Settings – Power – Shutdown option to put the machine into a deep sleep and get very quick start up. Use stop-computer and completely shutdown but have longer startup times.
Question now is does the deep sleep put any drain on the battery for laptops? I’ll try and find out.