Comment 37 for bug 315996

well, I'm not sure what to suggest. The first thing is to go to Control Panel, Add/Remove programs to confirm that Python 2.5 does not exist and confirm that whatever you have is newer then 2.5.
Also you can go to the directory \Python25\include\ and open the file patchlevel.h to confirm that what you have is newer than 2.5. Also I would do a global search for python.exe using a command like dir/s \python.exe and if there are multiple versions of this file then rename every single one of them to be something else and then confirm that python no longer runs from inkscape, and then re-enable the python.exe in the directory C:\Program Files\Inkscape\python\ to see if that helps, and then if necessary re-install python until you get a version that is newer than 2.5.