What am I doing wrong installing Python 2.7.3?

[Etherus]

I have downloaded the windows installer for a 32 bit installation of python 2.7.3 but it tells me that:

The feature you are trying to use is on a network resource that is unavailable.

Click OK to try again, or enter an alternative path to a folder containing the installation package python 2.7.1 msi in the box below.

When I click OK I get:

The path C:\...\downloads\python -2.7.1 msi cannot be found. Verify that you have access to this location and try again or try to find the installation package python 2.7.1.msi in a folder from which you can install the product Python 2.7.1.


(what is it with the 2.7.1? rather than 2.7.3 also?) 

By very grateful if someone could steer me in the right direction.