I switched te boot sistem in BIOS, from UEFI into LEGACY so I can switch to boot from USB. Now , when I start the laptop, and in BIOS is with LEGACY it says : "This product is covered by one or more of following patents: US6,570,884 US6,115,776 and US6,327,625. And when I switch in BIOS on UEFI (as it was on the begin) it shows the message "No bootable device". But also when it is in UEFI mode in BiOS, the hard disk is not recognized. Only in LEGACY mode is recognized. Can u please tell me what can I do?