Windows 7 Goes to Sleep in conflict with Power Option Setting

A lot of times Dell and other companies ship software bundled with the windows install. My Asus laptop had its own power management system that played havoc with my system for days. I would check to make sure there isn't a Dell program playing games.

Also on another note have you checked the 'Advanced Settings' in the power management. There is a other options in there for sleep/hibernate what not.

I had the same problem on Windows 10 and it happened when I resumed the notebook from sleep by using USB wireless mouse. It seems that sometimes Windows doesn't know why it resumed from sleep and assumes it was a remote wakeup.

However Microsoft added new hidden settings in Windows 7 which control sleep timeout after remote wakeup and the default setting is only 2 minutes!

To fix this, you need to change registry values AcSettings and DcSettings for timeout when on AC power and when on battery power. Or you can simply delete these values. They are under

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Power\PowerSettings\238C9FA8-0AAD-41ED-83F4-97BE242C8F20\7bc4a2f9-d8fc-4469-b07b-33eb785aaca0\DefaultPowerSchemeValues\@@@

where @@@ represents Power Scheme:

Balanced: 381b4222-f694-41f0-9685-ff5bb260df2e\

High Performance: 8c5e7fda-e8bf-4a96-9a85-a6e23a8c635c\

Power Saver: a1841308-3541-4fab-bc81-f71556f20b4a\

Based on this technet thread.

Same power automatic shutdown problem here. Again goto advanced power management settings, look indeed for hybernate or sleep, change the 180 minutes into 0 for meaning NEVER.

Now I hope it works. The problem was here identical on Windows 8.