Hi,
Could you tell me the model of your Asus laptop?
Does the loop give an error during boot or does it show a blue screen?
If it's an Asus, to access the BIOS press the F2 or Del keys as explained here:
https://www.asus.com/support/faq/1008829/
While this is not a Microsoft website, it is the official site of [Asus].
Thanks