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BIOS setting lost after a computer restart and disprays bad SIMOS error

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Hi
try save your bios once again, if it fails..change your cmos battery.

Posted on May 20, 2009

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Posted on Jan 02, 2017

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My laptop unable to boot it say no bootable device if I remove and insert again simos battery is it may start correctly?


You're laptop doesn't boot?
This could have multiple reasons:
-You don't have windows (or a diffrent os) installed
-There is no harddrive in your laptop or it's broken
-You need to change your bios settings to make sure that it's trying to boot from your harddrive.

The cmos battery saves your bios settings. Unplugging it just reset's all those settings but it probably won't help you.

Jun 28, 2014 | Toshiba Computers & Internet

1 Answer

Error code 2000-0148


It may be a hard drive failing, or possibly a BIOS problem. To try and fix it:
1. Restart computer
2. As it's rebooting hit F2 (some computers use different F keys) to take you to BIOS
3. Reset BIOS to default settings
4. Press F10 and save/exit BIOS.
5. PC will restart, check for error again when it has restarted.

Sep 04, 2013 | Dell Inspiron 1525 Notebook

1 Answer

Bios password


open and remove simos battery, power it up and then fix the simos battery back

Aug 21, 2013 | Dell Vostro 1400 Notebook

1 Answer

Main Bios Checksum Error!!!


Take notes of the BIOS settings of your computer for use after replacing the CMOS battery.

To access the computer's BIOS, restart your computer and press the "F 10" function key during the restarting process.


The BIOS configuration panel will then open and you can write the specific settings for your computer down to use for BIOS configuration after replacing the battery.


Turn off your computer and remove the power cable and if installed, battery.

Remove the computer hatch which will vary in method depending on the brand and model of computer you have.


On some motherboards cmos batteries are soldered in


Locate the CMOS battery on the motherboard.

The more popular model of CMOS battery used is annotated with a CR2032 label and is a round shaped button.


Firmly remove the CMOS battery from the motherboard.

Align the new CMOS battery with the positive side orientated towards you and insert into the mother board.


Restore the power cables to your computer and restart the PC.

During the restarting process, depress the "F10" function key to enter the BIOS setup screen.


Update the date in the BIOS and change the BIOS settings to match those you recorded in step one.


After the settings are updated, select the "Save and Quit" menu option and restart your computer to finish the CMOS battery replacement.


hope this helps




Sep 23, 2012 | Computers & Internet

1 Answer

My samsung Q45 notebook tells me to insert the windows installation disc and restart my computer. I have not got this, can anyone help?


First disconnect any external devices connected to the computer except the mouse and keyboard.

This error usually happens if the hard drive is not getting detected by the operating system or due to bad hard drive.

First check if all the physical connections to the computer are set correctly.
If it is a laptop remove the laptop battery, wait for 5 minutes and then connect back the battery, check if it works.


If the above step does not work then you will need to run CHKDSK tool to check if there are any bad sectors on the hard drive would suggest running chkdsk which would scan for any bad sectors on the hard drive and if those errors are repairable if would repair and if it cannot at the end of the chkdsk scan you would see a message "found one or more unrecoverable error on the hard drive" which means the hard drive is damaged.

If you have a Windows Vista installation disc, you need to restart (boot) your computer using the installation disc. If you do not restart your computer from the disc, the option to repair your computer will not appear.

1. Insert the installation disc.
2. Restart your computer.
Click the Start button, click the arrow next to the Lock button , and then click Restart.
3. If prompted, press any key to start Windows from the installation disc.
Note: If your computer is not configured to start from a CD or DVD, check the information that came with your computer. You may need to change your computer's BIOS settings. For more information, see BIOS: frequently asked questions.
4. Choose your language settings, and then click Next.
5. Click Repair your computer.
6. Select the operating system you want to repair, and then click Next.
7. On the System Recovery Options menu, click command prompt and in the command prompt typechkdsk /f and wait till the scan is completed and later restart the computer and check what happens.

http://windows.microsoft.com/en-US/windows-vista/Make-system-repairs-from-the-Windows-Recovery-Environment-from-Windows-Vista-Inside-Out

Important: While performing chkdsk on the hard drive if any bad sectors are found on the hard drive when chkdsk tries to repair that sector if any data available on that might be lost.

Hope this helps!

Jul 09, 2012 | Samsung Q45 Notebook

1 Answer

L would like to know how to reset bios setup


Good day,its only for load set-up default or,jumper at simos settings..tnx

Aug 17, 2011 | Dell Motherboard For Precision 470...

1 Answer

I keep getting an error mess of 0xc0000225 when turning on my laptlop



We would like to know the exact error message or error code you receiving. Follow the below steps to get error message.

i. Restart the computer

ii. Start tapping F8 key

iii. You will see advanced boot option window

iv. Select " Disable automatic restart at system crash"


You may even check for the boot sequence order in BIOS.


BIOS DISCLAIMER: Modifying BIOS/complementary metal oxide semiconductor (CMOS) settings incorrectly can cause serious problems that may prevent your computer from booting properly. Microsoft cannot guarantee that any problems resulting from the configuring of BIOS/CMOS settings can be solved. Modifications of the settings are at your own risk.

Mar 24, 2011 | Computers & Internet

1 Answer

Getting a CMOS checksum bad error when starting my Acer M5640 Desktop with Windows 7 Thanks Daniel


Solutions to CMOS Checksum Bad Error

The CMOS Checksum Bad Error can be fixed easily by following the listed steps carefully.

CMOS Battery may not be functioning properly

If you suspect that your CMOS battery is not functioning properly, you can easily change it. Before changing your battery, reboot your computer to make sure that the error still exists. If it does, go into your CMOS and write down all of the settings. If all the settings are lost, you can usually retrieve them from your computer manufacturer. Now locate the battery and remove it, you might need to consult your computer's manual or technical support to remove your battery (the battery a flat, shiny silver colored and coin-shaped). Take down the CMOS battery's information such as volt, size, etc. Once you have your new battery, you can replace it and reenter your CMOS settings. If your battery was the cause of the CMOS Checksum Bad Error, you should have solved the problem.

Your BIOS may have been updated

If your BIOS have been updated recently, your CMOS settings may have reset. Make sure that the values entered in the BIOS are correct or simply reset them to the default settings. If you believe that a virus has updated your BIOS settings, run a virus scan and make sure that the BIOS settings are back to the default.

The Computer may not have been shut down properly

Sometimes when running MS Windows, if you shut down your computer without first properly shutting down your operating system, it will corrupt the CMOS settings causing the CMOS Checksum Bad Error. You can easily avoid this error by making sure that you completely shut down your computer properly before turning off the main power. Usually this entails going into the Start Menu, clicking on Turn Off Computer/ Shut Down. If improper shutdown was the cause of the error, you may have solved the issue.



akuma_ryu21 rate it pls!!

Jan 21, 2011 | Computers & Internet

1 Answer

Booting problem


There are usually three main reasons that a CMOS Checksum Bad Error has occurred. They include:
  • CMOS Battery may not be functioning properly. The battery life may have expired.
  • Your BIOS may have been updated (either by user or possibly a virus)
  • The computer may not have been shut down properly e.g. shutting off the computer's main power without first shutting down the computer (MS Windows requires you to shut down your computer before shutting off the power).
Solutions to CMOS Checksum Bad Error The CMOS Checksum Bad Error can be fixed easily by following the listed steps carefully.
CMOS Battery may not be functioning properly
If you suspect that your CMOS battery is not functioning properly, you can easily change it. Before changing your battery, reboot your computer to make sure that the error still exists. If it does, go into your CMOS and write down all of the settings. If all the settings are lost, you can usually retrieve them from your computer manufacturer. Now locate the battery and remove it, you might need to consult your computer’s manual or technical support to remove your battery (the battery a flat, shiny silver colored and coin-shaped). Take down the CMOS battery’s information such as volt, size, etc. Once you have your new battery, you can replace it and reenter your CMOS settings. If your battery was the cause of the CMOS Checksum Bad Error, you should have solved the problem.

Your BIOS may have been updated
If your BIOS have been updated recently, your CMOS settings may have reset. Make sure that the values entered in the BIOS are correct or simply reset them to the default settings. If you believe that a virus has updated your BIOS settings, run a virus scan and make sure that the BIOS settings are back to the default.
The Computer may not have been shut down properly
Sometimes when running MS Windows, if you shut down your computer without first properly shutting down your operating system, it will corrupt the CMOS settings causing the CMOS Checksum Bad Error. You can easily avoid this error by making sure that you completely shut down your computer properly before turning off the main power. Usually this entails going into the Start Menu, clicking on Turn Off Computer/ Shut Down. If improper shutdown was the cause of the error, you may have solved the issue

Mar 05, 2010 | Microsoft Windows XP Professional With...

4 Answers

Cmos checksum bad...usb current status detected system shut down 15 sec


Situation Remedies If you have encountered this error and would like to fix your computer, here are some remedies for each situation:
CMOS Battery Not Functioning Properly: If you suspect your CMOS battery is not functioning properly you can easily change it. Before changing your battery, reboot your computer to make sure that the error still exists. If it does, go into your CMOS and write down all of the settings. If all settings are lost, you can usually get them from your computer manufacturer. Now locate the battery and remove it, you might need to consult your computers manual or tech support to remove your battery. Take down the CMOS batteries information such as volt, size, etc. Once you have your new battery, you can replace it and reenter your CMOS settings. If your battery was the cause of the CMOS Checksum Bad Error, you should have remedied the problem.
Your BIOS has Been Updated (either by you or possibly a virus): If your BIOS has been updated recently, your CMOS settings may have become reset. Make sure that the values entered in the BIOS are correct or simply reset them to the default settings. If you believe that a virus updated your BIOS settings, run a virus scan and make sure that the BIOS settings are back to the default.
The Computer Was Shut Down Improperly: Sometimes when running MS Windows, if you shut down your laptop or desktop without first properly shutting down your operating system it will corrupt the CMOS settings causing the CMOS Checksum Bad Error. You can easily avoid this error by making sure that you completely shut down your computer before turning off the power. Usually this entails going into the Start Menu/ Turn Off Computer/ Shut Down. If you received the error, shut down the computer properly, if this is the cause of the error, the error message will not return.

May 11, 2008 | ASUS M2N-MX Motherboard

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