Generally the blue screen of death error occurs on Windows operating system mainly because of sudden system shut down, though everything was going smoothly. Similarly, STOP Error 0×00000021, is found written on the blue screen. Due to this reason it becomes difficult for the user to perform any work on the Windows operating system.
STOP Error 0×00000021 mainly arises due to corruption of any important registry file. Using any depleted driver and virus invasion. Due to all this the performance of the operating system slowly gets degraded. Due to this reason it becomes important for the user to get rid of STOP Error 0×00000021 message as soon as possible, in order to start using PC properly.
“STOP Error 0×00000021” is however is dangerous and needed to fix instantly using automatic fix tool.