Locate the computer’s CMOS battery (it will be found somewhere on the computer’s motherboard) and remove.Remove any and all power cables from the computer, making sure that the computer’s access to electricity is completely cut off.In order to reset your computer’s BIOS, you need to: A computer’s BIOS can be reset by simply removing the CMOS battery from its motherboard for a couple of minutes, although this trick doesn’t work with laptops as their motherboards are not readily accessible. Many users affected by this issue have reported success with resetting their computers’ BIOS. Follow this link to run a full SFC scan on your PC. If the above mentioned method doesn’t solve your issue, you can use System File Checker Scan in order to resolve issues related to corrupted files causing this error. So, this file can also be damaged resulting this error. exe file belongs to Microsoft server or client. csrss.exe: The second file causing this error is Csrss.exe.If this file gets damaged, then this error causes the PC to boot to the Windows Login. This file can be damaged due to mismatch of System Files or 3rd party softwares. winlogon.exe: As the name of the file represents, this file is responsible for the login and logout operations inside Windows.There are two files that are the major cause of this error to appear. So, after the update, it doesn’t boot to Windows and displays this blue screen of death along with error. This issue arises when Windows is updated. So, you would definitely want to know the reason behind this hilarious error message. Performing a system restore also doesn’t work. This error also persists even after restarting the PC. So, it may have some serious issues damaging the internal structure of Windows OS. This error appears inside a blue screen of death. It states that Your PC ran into a problem and needs to restart. One of those errors is associated with the hex code 0xc000021a. After a while, when Microsoft started pushing updates, some errors were solved but there were a plenty of them which weren’t. Windows 8/10 had a number of issues at the time when it was first released.

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