windows 10 starts slow

insufficient detail in your post to assist
All we have is the system spec - which is always helpful
However other than that you have restricted your post by way of useful information to simply the title

that is not really helpful
Do you mean slow to progress to the lock screen
slow to fully load after that and the password - slow to complete the loading of the desktop icons
Please describe exactly where this slowness is

Also please list what you have tried
For instance one reason for a slow performance on loading windows from the password screen can be the number of start items
Ctrl + Shift +Esc
Task Manager
Start Up
which items please are shown as enabled please - either list them or select those you KNOW you do not need at startup and click disable

Please when you reply answer the questions regarding the slowness etc.

 

Go back to task manager startup
On top right you should see last BIOS time
what does it show please

 

Please confirm that you are saying that it takes 2.5 minutes from the time you press the start button until the windows icon on the screen and then after that you have to log in and that the BIOS you have quoted is the BIOS time shown in task manager as that entry on the top right is the time from pressing the start button to load the BIOS
I am surprised it reads 0.0

as per this link
https://www.howtogeek.com/265623/what-is-last-bios-time-in-the-windows-task-manager/

 

OK start windows then follow carefully this procedure so that next time you start windows it is in clean boot and it will stay in clean boot until we change it back
See how it is please in clean boot
https://support.microsoft.com/en-gb/help/929135/how-to-perform-a-clean-boot-in-windows

CAUTION follow exactly the steps shown if you do not hide all microsoft services it will cause problems

Please then check how it is in clean boot