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Bug Check 0xBF: MUTEX_ALREADY_OWNED

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The MUTEX_ALREADY_OWNED bug check has a value of 0x000000BF. This indicates that a thread attempted to acquire ownership of a mutex it already owned.

Important

This article is for programmers. If you're a customer who has received a blue screen error code while using your computer, see Troubleshoot blue screen errors.

MUTEX_ALREADY_OWNED Parameters

Parameter Description

1

The address of the mutex

2

The thread that caused the error

3

0

4

Reserved