The operating system cannot be booted because the kernel is missing or contains errors.įile: \ WINDOWS \ system32 \ ntoskrnl.exeĮrror code: 0xc0000221. In this article we will demystify the possible causes and then propose solutions to solve the problem.Ī complete error message for this error code can be found below. Several users report that they are stuck in an automatic recovery cycle with this error code. It might also occur when the object's reference count drops below zero, whether or not there are open handles to the object.Error code 0xc0000221 is found in some Windows 10 users immediately after starting the computer. This bug check can occur because an object's reference count goes to zero while there are still open handles to the object. Typically, the inconsistency is caused by a driver that decreases the reference count of an object too many times, making extra calls that dereference the object. This bug check is caused by an inconsistency in the object's reference count. When the driver is done with the pointer, the driver calls another kernel routine to decrease the reference count by one.ĭrivers must match calls to the routines that increase (reference) and decrease (dereference) the reference count. Each time a driver uses a pointer to an object, the driver calls a kernel routine to increase the reference count of the object by one. The reference count of an object is illegal for the current state of the object. Luckily, you can take a snapshot before each deletion and revert if that is not it. You will probably need to delete drivers one at a time in the virtual machine.
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