When I put my Vista Home Premium computer to sleep, it unexectedly wakes up 15-20 minutes later for no reason. I have made sure that on all my devices including the network adapter (except the mouse) that the "allow this device to wake the computer" is unchecked. I have also tried removing Sidebar gadgets to see if one of those was the culprit. I also thought maybe it could be Windows Live Messenger but I set it to not start with Windows and the computer still popped out of sleep mode. I am running (Counter Spy's new) Viper program for anti-virus and anti-spyware and NetNanny 5.6 for as a parental content filter. Any ideas or suggestions would be appreciated.

Thanks!

Jeff

Shawn, thanks for the suggestion. I have tried most of the items on this tutorial list before, but not the powercfg command. I ran that command and found two items: my mouse and my High Definition Audio Controller. I have Realtek High Definition Audio which was listed under Sound, Video, and Game Controllers. I right-clicked on the High Definition Audio item and selected properties and there is no Power Management Tab. However, under the Details tab and the Property Box, I selected Power Data and received the following results:
PDCAP_D0_SUPPORTED
PDCAP_D3_SUPPORTED
PDCAP_WAKE_FROM_D3_SUPPORTED

Power State Mappings:
S0 -> D0
S1 -> D3
S2 -> unspecified
S3 -> D3
S4 -> D3

Can you offer any advice on these settings?

Thanks again Shawn. I checked my Multimedia settings and it is set to Allow the computer to sleep. So, I put the computer to sleep, it woke up in about 15 minutes, so I tried the powercfg -lastwake command.

Here is the info I got back:
Wake History Count -1
Wake History {0}
Wake Source Count -1
Wake Source {0}
Timer: Fixed Feature
Timer Expired <RTC>

Could this mean there is a timer set to come out of sleep mode? Thoughts?

Jeff

Shawn, I alos tried and check the BIOS settings, I re-started my computer and went into setup, Power, and the only realted item was Wake On Lan -S4 - Disabled. I will test unplugging the network connection and let you know the results.

I unplugged my network connection, and put the computer into sleep mode. yet it came awake after about 10 minutes or so.

Any other ideas or suggestions would be appreciated. I just feel at this point that I have tried all the known tiops and advice.

Thanks!

Jeff

Thank you for the suggestion John. I went into Task Scheduler and reviewed all the tasks under the Task Scheduler Library to see if any had the condition set to wake the computer to run that task. I found one: It is called TMM in the list and the description is: Microsoft Transient Multi-Monitor Manager. And it is currently running on my computer. Any ideas or knowledge about this task and if ok to disable the wake condition to run the task?

Thanks much.

Jeff