In this link, it shows the definition of the two different boot times.
Can I confirm with you that, does Main Path boot time include Computer Startup time?
- Main path boot time:
from the beginning to the start of the shell (typically explorer.exe).
The user has successfully logged in and the shell is starting.
- Computer startup:
from the beginning to the start of LogonUI.exe. The user is now able to log in to the computer.
You are very much appreciated