When you encounter an error message that says, Chassis Intruded…Fatal Error…System Halted on your monitor then it indicates that the Chassis or the cabinet that holds the CPU, GPU, motherboard, and many more is open. It is a security feature offered by OEMs wherein a connector that is found in the motherboard can detect if the chassis component has been replaced or removed. There are a few OEMs that offer onboard speaker or PC chassis speaker which goes off in this kind of situation.
Obviously, the problem has something to do with the hardware and in most cases, you have to put the jumper back on the motherboard with the pin-labeled chassis signal and ground. There are times when some OEMs offer a simple switch that is armed automatically when you properly close the chassis. Thus, you need to check if this switch has something to do with the error. If there is no switch or if it doesn’t resolve the issue, although you may be able to get into Windows with a warm boot, the normal Windows boot won’t really work unless you fix the problem. It is rather false positive and has something to do with the RTC RAM state or the BIOS. You might need to completely disable the Chassis intrusion feature to fix the error.
Refer to the suggestions given below to try and fix the “Chassis Intruded, Fatal Error … System Halted” error.
You can easily clear CMOS by shorting two pins which can be found side by side on the motherboard. Keep in mind that it may vary from OEM to OEM although the basics are still the same to clear CMOS. In addition, you might also have to download the manual from the OEM’s website so that you’ll know its exact location.
You can also try booting into the BIOS. All you have to do is tap either the DEL or F2 keys to get there. Note that everything will be set back to their default setting after you reset the CMOS.
In this option, you have to look for the Chassis intrusion feature in your BIOS. It might be located under security. From there, disable it and check if the problem’s fixed.
Once you have disabled the Chassis feature, you need to reconfigure the BIOS the way you expect it to be or to what it was before the reset.

Error CausesIn the command prompt type sfc/scannow.This will scan the system files and fix any errors. Reboot the computer and try to install updates.
To personalize the lock screen do:When Windows evolved into Windows 10, the program known as Windows Security Essentials is no longer. It is now the program known as Windows Defender. When a computer is upgraded from a previous version of Windows up to Windows 10, the Windows Defender takes over and will replace the Security Essentials. In a small percentage of Windows 10 upgrades, something will go wrong and the new program will fail to replace Security Essentials. The result will be that the operating system has both of the programs installed. In this case, Windows Defender will not offer any protection and Security Essentials will not be able to defend either. This error code will also present itself when the Windows Mail App in Windows 10 fail to retrieve and sync email from the user's account.
Common symptoms include:
Error CausesError code 0x80070426 will present itself when a PC user has upgraded their OS from a previous version of Windows to the new Windows 10 version. When this happens, a small portion of users will experience the disconnect between older versions of specific programs, namely the virus protection. When the previous version of the program under a different name is not completely removed and the new virus protection program is installed, the programs will cancel each other out and collectively offer no protection.
This error code may also be found when Windows 10 tries to sync the user's email with the Windows Mail App.
Hold down the Windows Key and press R. Type in taskmgr into the run dialogue. You should locate the Windows Defender Service (this may show up as Windefend). Right-click on it and then choose Stop.
This will stop the program, but the program will start back up automatically when the computer restarts. While this program is stopped, uninstall Essentials.
To do this: go to Control Panel, Programs, and Features, Uninstall a Program. Alternately, you may hold down the Windows Key and press R, type in appwiz.cpl, click OK, and then locate Microsoft Essentials. Uninstall it, and then restart your computer.
After this is done, go to Settings, Update, and Security. Choose Windows Defender and ensure that Real-time protection is on. Refer back to the Task Manager, Services. Make sure that Defender service is on and running.
When error code 0x80070426 presents itself in the form of an error with the Mail app, it may be necessary to run an SFC scan.
Right-click on the Start menu or Windows icon, and select Command prompt. The command prompt may be navigated by using shortcut keys Win and X and then select it.
Run the command prompt and then type in sfc /scannow and then press enter. The SFC scan will be run, and be careful not to abort the process before it has finished. This will scan for any files that are lost or corrupt on the PC.
If the scan has found any corrupt files, type in this code and then hit Enter: findstr /c:”[SR]” %windir%LogsCBSCBS.log >”%userprofile%Desktopsfcdetails.txt.
To skip the repair of corrupt or missing files, type in: Dism /Online /Cleanup-Image /RestoreHealth. The details of the scan can be found on the sfcdetails.txt file that will be on the desktop.
del /f %windir%logscbs*.log
“Script: <PATH of the VBS Script> Line: x Char: x Error: The description of the error. Code: xxxxxxxx Source: (Source of the error)”At the time of writing, it isn’t clear yet what the root cause of the error really is but there are several potential fixes you can check out to fix it. You can try to run the System File Checker or set the default value for the .vbs key, or troubleshoot the problem in a Clean Boot State. You could also try to repair Install Windows 10 or scan your computer for malware. For more detailed instructions refer to the following options.
Error CausesHKEY_CURRENT_USERSoftwareMicrosoftWindows NTCurrentVersionWinlogon