If these two values don’t match the PC may return a CMOS checksum error. This is an error detection mechanism is what is referred to as checksum, otherwise known as a form of redundancy check for picking errors in data. If the computer lost power while it was still running, it may have corrupted the CMOS. Make sure the computer is ready to be shut off before turning off the computer. If you have a laptop computer, make sure the battery is charged before disconnecting the power connection.

  • With the code in view, you can scroll through it to review it and ensure that different aspects are executing functions you want.
  • The BIOS will thus not be able to return the correct checksum value and the computer will have to use the BIOS default settings, hence the error.
  • Please edit your answer to include the actual solution to the posted question.

This will cause the CMOS checksum error. In this circumstance however the error is usually temporary as the PC will boot correctly the next time you properly shut your machine down. And, unfortunately, that battery will die at some point. The BIOS will thus not be able to return the correct checksum value and the computer will have to use the BIOS default settings, hence the error. We suggest you try to update the BIOS again or roll back to an earlier version. To reset your BIOS start hitting the F10 key as soon as you press the PC’s power button.

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Make sure that the values entered in the BIOS are correct or simply reset them to the default settings. If a virus has updated the BIOS settings, run a virus scan and make sure that the BIOS settings are back to the default. That is, if we press the F1 key what we will do is restart our computer so that generally the problem will not be solved and we will end up in the same error. If the error still occurs after rebooting the computer, enter CMOS setup and check all values. Also, verify the date and time are correct. Once everything is verified and changed, make sure you save settings and then exit the CMOS setup.

If the User Account Control dialog box displays, click Yes to continue. You may not see this dialog box, depending on your User Account Control settings. The same regeditcommand can be executed fromCommand Prompt. After opening Command Prompt, just type out the command and press Enter. There’s not an obvious shortcut for the tool in most versions of Windows, so the best way to open it is by executing it from a command line. Click the check box under Allow next to the Full Control permission.

Fiddle with your code snippets easily and run them. Start writing code instantly without having to download or install anything. Easily edit documents and add text, shapes, comments and highlights to a PDF file. Fill out PDF forms and modify your PDF by adding annotations. Once you have finished your editing, you can tell the Decompiler software to take all the separate parts of the file it made and put them back together as one. Once the software is loaded into the Decompiler, select “Recompile” from the “File” menu to complete this operation. Right click on the System32 folder and open the Properties dialog box.

If the above measures have not fixed this error, you can try manually removing the entry from the registry. Due to the sensitivity of the information in your Windows Registry, only those comfortable editing the registry should attempt this. If still not able to delete the key, change its permission for Administrator with Full Access right first.

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This can be achieved with the System account that is even more powerful than the administrator and therefore has more access to protected registry keys. This has the added bonus of allowing you to view the SAM and SECURITY registry keys which are otherwise hidden. A small portable tool called RunAsSystem is able to do this for any program you tell it to, here’s how.

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