I know I'm the newbie on the forums, as this is only my second post, but have you tried out Bootvis? I've used it multiple times, and though m$ doesn't say directly it'll increase boot times, the times I've used it, it usually does. If you run it correctly, it'll show you what things are taking certain amounts of time to load when you boot up, and from there you can usually figure it out on your own. My biggest delay was my AV, which I've since changed and saved about 10 seconds. Hope it helps!