How can I reset CMOS / BIOS settings?

If your computer is having issues booting, has errors during boot, after adding hardware is running into issues, and/or you're having other abnormal system behaviors that cannot be resolved though any other method it may be necessary to reset the CMOS settings and/or load the default or fail-safe defaults as explained below.Load / Reset defaults1.
Enter CMOS setup, additional information about entering CMOS setup can be found on document CH000192.2.
In CMOS setup look for an option to reset the CMOS values to the default setting or an option to load the fail-safe defaults. With many CMOS setup screens there will be a function key to do this; for example, the F6, F11, or F12 key.
Other setups may actually list an option that you can arrow over to using the arrow keys and press Enter.3. When found and selected you'll likely be asked if you're sure you wish to load the defaults press Y for yes or arrow to the yes option.Reset Configuration DataIn addition to restoring the system defaults if you've recently added new hardware or resetting the default values did not help resolve your boot issues you may also want to reset the configuration data. Below are some examples of how this can be done.
Keep in mind that unfortunately all CMOS screens are different and these instructions may not be exact steps for your CMOS.Under advancedIf you're working on a computer with a Phoenix BIOS that has Main - Advanced - Security - .... across the top of the screen you can get to this setting by using the right arrow to move over to Advanced and under Advanced arrow down to Reset Configuration Data and changing the value from Disabled or No to Enabled or Yes.Once the above has been done press the F10 key and save and exit CMOS setup.
In PnP/PCI ConfigurationsIf you're working with a Phoenix BIOS that has several different options and one of them is PnP/PCI Configuration move the cursor down to this option and press Enter. Within the PnP/PCI Configurations change the Reset Configuration Data from Disabled to Enabled.
Once the above has been done press the F10 key and save and exit CMOS setup.Hard reset the CMOSIf the above steps do not work and/or you're unable to enter CMOS to reset it to the factory settings it may be necessary to perform a hard reset on the CMOS using a jumper or dipswitch on the motherboard. Unfortunately because all motherboards are different the steps on how to do this can only be found through your motherboard manufacturers documentation.