I manually changed the RAID storage controller as my Dell XPS 15 laptop was unable to boot in AHCI in order to recognise my SSD drive. Now the laptop no longer boots in either RAID or AHCI. it is stuck in a boot loop and I cannot get to the advanced boot options but I can get to the BIOS and the standard boot options window. I don't have a Windows 10 disk or any kind of backup due to the laptop being new. Any suggestions please??