Microsoft required PC manufacturers to put a Secure Boot kill switch in users’ hands. For Windows 10 PCs, this is no longer mandatory. PC manufacturers can choose to enable Secure Boot and not give users a way to turn it off. However, we’re not actually aware of any PC manufacturers that do this.

Is it OK to disable secure boot?

Yes, it is “safe” to disable Secure Boot. Secure boot is an attempt by Microsoft and BIOS vendors to ensure drivers loaded at boot time have not been tampered with or replaced by “malware” or bad software. With secure boot enabled only drivers signed with a Microsoft certificate will load.

What happens if I disable secure boot Windows 10?

Thanks for your feedback. Windows 10 works with or without secure and you will notice no affect. Like Mike explained you need to be more careful about boot sector virus affecting your system. but the latest version of Linux Mint seems to work with Secure Boot on (not sure about other distros).