Secure boot or Microsoft secure boot is a feature first introduced with Windows 8, and included as part of Windows 10. In conjunction with the computer's UEFI secure boot technology, it helps prevent malware, such as rootkits, from running when a computer boots. Computers that come with Windows 8 or Windows 10 have secure boot enabled by default and will prevent any changes to the boot settings or firmware unless it is disabled.
Note: Although secure boot can improve the security of a computer, it also complicates booting from another device for a legitimate reason, such as installing an operating system. If you are having trouble installing or running any software that has anything to do with booting, consider disabling secure boot.
How to disable secure boot
Secure Boot can be disabled on a computer by entering the BIOS Setup and entering the boot section.