Troubleshooting Error 800B0100, CBS_E_IDENTITY_MISMATCH, during Service Pack 1 installation on Windows 7 or Windows 2008 R2

I wanted to bring everyone’s attention to a recent blog I worked with on a co-worker of mine regarding issues we’ve seen with locking down permissions on componentized directories.  It’s a good read and an easy plug for my team site.  Enjoy. –Joseph  

How does Windows choose which version of a file to install?

An engineer on my team, Jim Collins, worked on this blog entry and I know its something that we see a lot of questions on here internally.  Enjoy, and thanks Jim! I’d like to talk about Multi branching support for Windows component based servicing.  To start let’s define some terms that I will be using…


So about Windows 8 …..

I’ve gotten quite a few emails to me via the blog now that the developer preview for Windows 8 has hit regarding the changes to servicing in Windows 8.  As some of you already know, I am working on the beta for Windows 8 from a support perspective.  However, I will not be talking about…

More on hard links

After posting my original entry on how hard links work, a number of comments were made requesting clarification.  The original blog posting is below: To his credit Joseph has been asking me about revisiting this topic for months. I think part of the confusion about how hard links work revolves around the difference between…


How to get individual driver files from Windows Update

Customers ask from time to time how they can pull down driver files that they see on the Windows Update site individually without the need to use the Windows Update Agent internally within Windows.  This can be done using the Windows Update Catalog site located here: You can use the site to pull down…


Alleviating pressure caused by component store size

I just wanted to make you all aware of a new KB article myself and a couple of teammates put together around component store growth and remediation.  I wanted to have something short and to the point and I think a lot of you might find this more useful than sifting through the blog trying…


How branching works for installing updates

I was asked this question the other day and I thought it would make a good quick entry in the blog.  A customer was having difficulty installing a particular update but they werent getting any kind of error message when they attempted the install.  The customer could tell that the update wasnt applying because the…


Support ending for Windows Vista SP1

In case you missed it, support for Vista SP1 officially ends on 7/12.  More information on this can be found in the link below: Here are the dates for the Server 2008 editions: –Joseph


Supported workaround for torn state installations on Windows 7 SP1

I have an update for those of you with systems in a torn state.  To clarify, torn state systems are those on which the unsupported workaround of deleting the checkpoint from the pending.xml file was used after getting the 0xC0000034 error during SP1 installations.  Even though it was not recommended by Microsoft, many customers used…


New fix released to prevent 0xC0000034 errors during Windows 7/2008 R2 SP1 installation

Quick update today for one of the issues seen during SP1 installation on Windows 7 and 2008 R2 installs.  The update will be available on Tuesday.  Released today: This update does not repair machines in a torn state but prevents the issue from occuring when installed on Windows installations that have not have SP1…