Узнать все даты перезагрузки

В событиях фильтр по коду 6005

6005 говорит нам, что компьютер только включится

Click on Event Viewer (Local) in the left navigation pane.
In the middle pane, click on the Information event type, and scroll down till you see Event ID 6005. Double-click the 6005 Event ID, or right-click it and select View All Instances of This Event.
A list of all instances of the 6005 Event ID will be displayed. You can examine this list, look at the dates and times of each reboot event, and so on.
Open Server Manager tool by right-clicking the Computer icon on the start menu (or on the Desktop if you have it enabled) and select Manage. Navigate to the Event Viewer.

в консоли net statistics server