Windows Vista Error when updating Microsoft XML Core Service

When attempting to install the latest version of MS XML Core service 4.x using the latest download from MS, I get error message, "Error opening installation log file. Verify that specified log file location exists and is writable ". The file is msxm;4-kb9361891-enu.exe. How to I correct this problem?

 

I downloaded the file directly from Microsoft. There was no error code included in the error message. The URL is:

http://www.microsoft.com/downloads/...f5-cb46-43df-a2b8-185639ba2807&displayLang=en and relates to Security Update for Microsoft XML Core Services 4.0 Service Pack 2 (KB936181).

The update was obtained manually and not part of the automatic updates. A driver scan utility indicated that my current files were not updated and pointed to the MS website.