Storport version 5.2.3790.4021 (KB 932755) can cause MMC deadlocks and other VDS tool problems - KB 940467 fixes/replaces 932755

The Storport driver is very important for dealing with SANs, volume shadow service and many other aspects of 'storage' with Windows 2003. If you have installed KB 932755 and have experienced problems with MMC hangs, you will want to install KB 940467, which fixes this issue.

As a side effect, your Storport build will go from 4021 to 4133, or "112 builds later".