Windows 7 My computer has insomnia


Extraordinary Member
Jan 14, 2009
There are a couple of issues.
When I put my computer to sleep, it auto wakes up in about 15 seconds.
As far as I can tell I have no timed wake up set.

Also it started going to sleep when my printer starts.
The printer (laser) creates a brownout on startup but the computer is connected thru an APC UPS.
The UPS log doesn't indicate a brownout.

It seems like you are facing a couple of issues with your computer regarding sleep mode and unexpected wake-ups. Let's address each problem one by one:

### Issue 1: Computer Automatically Waking Up
When a computer wakes up shortly after being put to sleep, there are a few potential reasons for this behavior. Here are some troubleshooting steps you can follow:

1. Check Scheduled Tasks:
- Make sure that there are no tasks scheduled to wake the computer. You can do this by:
- Pressing Windows Key + X and selecting "Power Options."
- Choose "Change when the computer sleeps" and then "Change advanced power settings."
- Navigate to "Sleep" > "Allow wake timers" and set it to "Disable."

2. Check Wake Timers:
- Run the command powercfg -lastwake in Command Prompt to identify the last device that woke up the system.

3. Update Drivers:
- Ensure that all your device drivers, especially for network adapters, are up to date. An outdated driver might be causing the issue.

4. Check Power Settings:
- Go to "Control Panel" > "Hardware and Sound" > "Power Options."
- Select your current power plan and click on "Change plan settings."
- Choose "Change advanced power settings" and review the settings under "Sleep."

### Issue 2: Printer Causing Sleep Mode
The interaction between your printer and computer leading to sleep mode could be due to power fluctuations. Here's what you can do:

1. UPS Configuration:
- Check the settings on your APC UPS to ensure that it is configured to handle power fluctuations effectively.
- Verify that the UPS is properly protecting your computer from brownouts and surges.

2. Printer Power Usage:
- If the printer is causing significant power fluctuations (brownouts), consider connecting it to a different power source or surge protector to isolate the issue.

3. UPS Log Analysis:
- Review the UPS log again to see if any unusual events are recorded around the time the printer starts up.

By following these steps, you should be able to troubleshoot the issues with your computer waking up unexpectedly and going to sleep when the printer starts. If the problems persist, additional diagnostics may be required to pinpoint the exact cause.