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  • Blog Post: Two Minute Drill: WMIDiag and Namespace Security

    Hello AskPerf. Happy New Year! My name is Gangadharan Prashanth and we’re going to kick off 2009 with a quick look at WMI Namespace Security and a common error message that we see when running the WMI Diagnosis Utility (WMIDiag). When running WMIDiag, we often see an alert that looks something like this...
  • Blog Post: WMI Troubleshooting: Permissions

    Back in June, we published our post on Basic WMI Testing . Today we're going to go over some common issues and ways that you can troubleshoot and recover from them - specifically rights and permissions. We're not going to get into troubleshooting scripts - what we're looking at is troubleshooting WMI...
  • Blog Post: WMI Debug Logging

    Welcome back.  After our series of posts on Windows Server 2008, today we're going to switch gears a little bit and look at WMI Logging.  We often get calls from customers regarding WMI issues beyond the Permissions or Impersonation Rights problems that we've discussed in previous posts. ...
  • Blog Post: WMIDiag.vbs and the Missing WMI Files

    Last year, we discussed using the WMI Diagnosis Utility in a post on Basic WMI Testing .  We’ve certainly noticed that more than a few of our customers are running the utility before contacting us, which certainly helps us in our troubleshooting.  However, in the last couple of months, we’ve...
  • Blog Post: Unable to connect to WMI locally – “Win32: The system cannot find the path specified”

    Good morning AskPerf! Sanket Jagtap here from Platforms Team here to discuss an interesting issue I recently worked.  My customer had a Windows 2008 R2 Server, and could not connect locally to WMI.  When they ran “wmimgmt.msc” and tried to connect, the following error appeared: Failed to connect...
  • Blog Post: WMI: Can't Connect to Remote WMI

    CAN'T CONNECT TO REMOTE WMI Description: WMI can fail for a number of reasons. Some of those can include not having appropriate rights and permissions for access to machines or namespaces, problems with provider registration, corrupted repository, and scripting errors to name a few. If WMI...
  • Blog Post: WMI Troubleshooting: Impersonation Rights

    Today we're going to take a look at an issue that is fairly common when dealing with WMI failures.  Starting with Windows XP, WMI providers are hosted in a separate process called WMIPRVSE.  Most of the time this provider host runs in the context of the Network Service Account.  In order...
  • Blog Post: Suggested hotfixes for WMI related issues on Windows platforms *Updated August 9th, 2013*

    Hi all, Some of the most difficult issues we face here on the Performance Team are WMI related issues. WMI is very pervasive, and when it breaks, you can experience a myriad of symptoms that are often very difficult to troubleshoot and fix. Here are a few examples of the symptoms that can occur, and...
  • Blog Post: Basic WMI Testing

    OK - following on from our recent WMI Architecture post, let's start digging into some Basic WMI Troubleshooting. There's a lot of material to cover, so this is going to be a multi-part series! It's important to note that these are general concepts and tips and the order in which we publish the material...
  • Blog Post: WMI: Rebuilding the WMI Repository

    REBUILDING THE WMI REPOSITORY Scenario Windows Management Instrumentation fails due to repository corruption or the repository is too large The WMI Repository "%windir%System32\Wbem\Repository" is the database that stores meta-information and definitions for WMI classes; in some cases the repository...
  • Blog Post: WMI: Issues with In-box OS WMI Provider

    IN-BOX OPERATING SYSTEM WMI PROVIDER Description: Failures with WMI providers rarely occur and it is often difficult to discern when having various issues with WMI whether a problem is due to an issue with a client application/script utilizing WMI, WMI itself, a WMI provider and/or the object...
  • Blog Post: WMI Architecture Basics

    Windows Management Instrumentation (WMI) is one of those technologies that tends to intimidate administrators who are unfamiliar with it. On the Performance team, we handle basic WMI issues - mainly relating to basic WMI functionality and permissions. So today, we're going to go over the WMI Basics....
  • Blog Post: WMI: Permissions and General Errors

    WMI PERMISSIONS & GENERAL ERRORS Description: WMI can fail for a number of reasons. Some of those can include not having appropriate rights and permissions for access to machines or namespaces, problems with provider registration, corrupted repository, and scripting errors to name a few....
  • Blog Post: WMIDiag 2.1 is here!

    Good morning AskPerf blog readers! Subheet here from the Windows Performance Team. It’s been a while since I’ve written a BLOG, and am really excited about this one. This time, I’m back with our brand new, much anticipated, WMI troubleshooting tool, WMIDIAG 2.1. The WMI Diagnosis...
  • Blog Post: Splitting up WMI Providers for Troubleshooting

    Good Morning AskPerf!  My name is Jim Martin, and I am a Support Escalation Engineer on the Performance team.  In today’s post, we are going to take a look at splitting up WMI providers.  I had been working with some customers who were experiencing issues with slow SQL WMI queries. ...
  • Blog Post: WMI: 3rd Party WMI Provider

    THIRD PARTY WMI PROVIDERS Description: Failures with WMI providers rarely occur and it is often difficult to discern when having various issues with WMI whether a problem is due to an issue with a client application/script utilizing WMI, WMI itself, a WMI provider and/or the object being managed...
  • Blog Post: WMIC: Leveraging the power of WMI

    We’ve covered different pieces of WMI in previous posts, but we have yet to discuss the Windows Management Instrumentation Command-Line (WMIC) in detail.  The WMIC provides administrators easy access to the WMI infrastructure.  Prior to the WMIC, you could only access the management infrastructure...
  • Blog Post: Two Minute Drill: Scriptomatic 2.0

    Hello AskPerf! My name is Jeffrey Worline and I am a Support Escalation Engineer on the Performance team in Texas. We’ve done a number of posts in the past about WMI, and different WMI tools, and today we’re going to take a look at a powerful tool that you can use. If you would like a little help with...
  • Blog Post: WMI: Microsoft Application (non-OS) WMI Provider

    MICROSOFT APPLICATION (NON-OS) WMI PROVIDER Description: Failures with WMI providers rarely occur and it is often difficult to discern when having various issues with WMI whether a problem is due to an issue with a client application/script utilizing WMI, WMI itself, a WMI provider and/or the...
  • Blog Post: WMI Troubleshooting: The Repository on Vista / Server 2008

    Last year we did a quick series on WMI troubleshooting.  Something that we didn’t cover is a quick method to verify the consistency of the repository.  Many of you have probably done a rebuild of the repository on Windows Server 2003 or an earlier operating system by renaming the repository...
  • Blog Post: Memory and Handle Quotas in the WMI Provider Service

    Hi folks, Mark Ghazai here once again with a quick tidbit on tweaking the WMI Provider Service (WMIPRVSE.EXE).  We’ve been getting some calls recently about the performance of this service and some failures that customers have been experiencing – in particular “Out of Memory” errors when certain...
  • Blog Post: WMI: Recompiling WMI MOFs

    RECOMPILING WMI MOF’S Description: Managed Object Format (MOF) is a compiled language, created by the Distributed Management Task Force (DMTF) and based on the Interface Definition Language (IDL). The MOF file is a mechanism for expressing and registering the classes, providers, properties, and...
  • Blog Post: Managing the System Managed Page File

    Hello again AskPerf!  Today’s post comes to us courtesy of Mike Morales, one of our Escalation Engineers here in Irving, TX.  For those of you who have been with AskPerf for a while, Mike wrote a post for us a few months ago on UMDH.EXE .  We’ve discussed the page file in a number of different...
  • Blog Post: Why doesn’t my WMI Script return any information?

    That’s right – more WMI adventures.  Today we’re going to take a look at a problem that we recently encountered with a customer whose WMI script did not return any Event Log information – but the Event Logs themselves were functioning with no apparent issues.  In this particular instance, the...