I'm having trouble fixing a slow Windows 10 boot. The computer itself is pretty decent: core i5-6260U, 16GB RAM, 512GB SSD, Intel Iris 540. This all in a Intel NUC6i5SYH.
In the beginning, it booted within 10 seconds. 1 year later, it became more than a minute. Once the login screen of windows is visible, everything works instantly. It's only the loading of the OS (The period where you see the windows logo and and loader)
I've already formatted the HDD and reinstalled Windows, no difference. I've already updated the BIOS to the latest version, no difference.
So now I'm doing a boot analysis, but I'm a bit stuck with how to get the correct analysis. These measurements all happen after the slow part.
How can I analyse what happens before this (The Windows loading screen)?