To start troubleshooting this issue, I recommend you to clear the CMOS. To do this, please remove power to the motherboard, all cables and the RTC (Real Time Clock) battery for 45 minutes. After this period of time, insert the battery back in and turn the system back on.
Once you clear the CMOS try a BIOS recovery update on your desktop board, for instructions check the following URL:
For the .BIO file that contains the latest BIOS version check the following url
If you are using the express BIOS update make sure you save it to your desktop , than go off line turn off all of your security and firewalls , check the properties and see if you need to UNblock it than run it as ADMIN. see how you do ??