providers/windows/boottime_windows.go

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//     http://www.apache.org/licenses/LICENSE-2.0
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package windows

import (
	"time"

	"golang.org/x/sys/windows"
)

func BootTime() (time.Time, error) {
	bootTime := time.Now().Add(-1 * windows.DurationSinceBoot())

	// According to GetTickCount64, the resolution of the value is limited to
	// the resolution of the system timer, which is typically in the range of
	// 10 milliseconds to 16 milliseconds. So this will round the value to the
	// nearest second to not mislead anyone about the precision of the value
	// and to provide a stable value.
	bootTime = bootTime.Round(time.Second)
	return bootTime, nil
}