Solved
SecureBoot troubles
I just finished preloading the Beta and it says that SecureBoot is no enabled. I checked everything in the article mentioned in the error and updated my BIOS, still it says this.
Ok, so I found out that TPM was on but SecureBoot wasn't. I rummaged around BIOS for a bit enabled SecureBoot. No error anymore. Be sure to check the SecureBoot with PowerShell with Confirm-SecureBootUEFI command
