Windows 7 Ultimate włącza się sam

A sprawdzałeś w BIOS'ie czy nie masz włączonej opcji Wake Up On LAN ?

Ewentualnie opcja:
Resume by Alarm
Determines whether to power on the system at a desired time. (Default: Disabled)
If enabled, set the date and time as following:

• Date (of Month) Alarm : Turn on the system at a specific time on each day or on a specific day in a month.
• Time (hh: mm: ss) Alarm : Set the time at which the system will be powered on automatically. Note: When using this function, avoid inadequate shutdown from the operating system or removal of the AC power, or the settings may not be effective.