Python 2.51 install on Vista "files in use"

[Steve Mavronis]

I tried to install Python 2.51 on Microsoft Vista Ultimate 32-bit because I 
use the 3D modeler software Blender 2.44, in case I needed additional Python 
support in the future for add-on scripts.

I got a warning about "files in use" during installation that needed 
updating. I aborted the install since the files were Intel Viiv and 
Microsoft Vista Media Center related so didn't want to mess them up. Can 
someone explain why Python wants to update those files?

Thanks in advance...