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  • Blog Post: Debugging Backwards: Proving root cause

    Matt Burrough here again.   On rare occasions when debugging, we'll actually know (or strongly suspect) what the root cause of a problem is at the beginning of our analysis - but we still need to investigate to confirm our assertion.   The following ...read more
  • Blog Post: How To Deadlock Yourself (Don’t Do This)

    Some APIs should come with a warning in big red letters saying “ DANGER! ”, or perhaps more subtly “ PROCEED WITH CAUTION ”.  One such API is ExSetResourceOwnerPointer . Although the documentation contains an explanation of what limited activity ...read more
  • Blog Post: What Did Storport Do With My I/O?

    In a previous article I showed how to track an I/O request from the filesystem, through the class driver, and to the storage driver.  In that article I concluded with " From this data we can usually assume that the request has been sent to the ...read more
  • Blog Post: Determining the source of Bug Check 0x133 (DPC_WATCHDOG_VIOLATION) errors on Windows Server 2012

    What is a bug check 0x133? Starting in Windows Server 2012, a DPC watchdog timer is enabled which will bug check a system if too much time is spent in DPC routines. This bug check was added to help identify drivers that are deadlocked or misbehaving.  ...read more
  • Blog Post: Great power. Great responsibility.

    When it comes to the registry, administrators are given great power to manually configure Windows to suit their needs, but even slight, seemingly innocuous changes to a particular key or value can have a drastic impact on basic operations of the system ...read more