I'm unable to use the USB ports after i did a 'load fail safe' in bios. My pc cannot detect external harddisk. I did the loading to solve the first problem that i had - i'm always getting this error msg "CPU is unworkable or has been chaged - Refer CPU SOFT MENU" everytime i reboot. Now that this problem has been solved, it looks like my USB ports are having pbm. Can someone advise what should i do? Thanks a lot.