If the problem occurs after the login then the system is already booted and fast boot is completely out of the equation. The only thing fast boot (the one set in BIOS) does is skip such things as the memory and the more extensive low level hardware checks. Your problems lie elsewhere.
OK, then it's probably just windows fast startup since that's a problem related to kernel-power 41. Just wanted to see if maybe I should disable both instead of just windows fast startup.