[Python-Dev] 2.6.2 Vista installer failure on upgrade from 2.6.1

[Jim Kleckner]

I went to upgrade a Vista machine from 2.6.1 to 2.6.2 and got error 2755 
with the message "system cannot open the device or file".

I uninstalled 2.6.1, removing all residual files also, and got the error 
message again.

When I ran msiexec as follows to get a log, it magically worked:
  msiexec /i python-2.6.2.msi  /l*v install.log

Should I attempt to explore this further or just be happy?