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