Its all due to your bios settings is upset..resetup the setting and this problem will be resolve....
like a week ago i went to start my computer and when it start it went into a black screen which say
"bios update compatible, Do not insert a cd or a floppy disk if you want to update from usb drive"
the computer was working fine, it just went in this stage from the night to the morning, is first time i see something like this.
Can someone help me solve this little puzzle!