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Reference number: CH000976
How can I reset CMOS / BIOS settings?
Question:
How can I reset CMOS / BIOS settings?
Answer:
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. To do this
follow the below steps.
Load / Reset defaults
- Enter CMOS setup, additional information about entering CMOS
setup can be found on document CH000192.
- 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.
- 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 Data
In 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 advanced
If 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 Configurations
If 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.
Additional Information:
- See our BIOS and
CMOS dictionary definitions
for additional information and related links about these terms.
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