Python(x,y) does not install - Python 2.7/PyQt4 is not installed on your computer

If relevant, please answer to the following questions:
1. What version of Python(x,y) have you installed?
2.7.3.1
2. Which components have you installed (Python(x,y) installer: component
page):
    b. Have you selected the "Full" component selection?
I selected full install

3. Have you selected the option "Customize installation directories"?

b. No
4. If the answer to 3. is yes, what installation directories have you
chosen?
5. Where did you install Python(x,y) itself?
a. default path

6. Have you installed Python(x,y):
    a. For "Current user only"
    b. For "All users"
I couldn't choose between these options
7. What is your operating system?
a. Windows XP

8. Is the operating system 64 bit?

b. No
9. When you installed Python(x,y), were you logged in as :

b. an administrator of the machine
10. If you are using Windows Vista/7, have you installed Python(x,y):
a. simply by double-clicking on the installer
    b. by right-clicking on the installer and selecting "Run as an
administrator"
11. Regarding installed softwares on your machine, how did you clean your
machine before installing Python(x,y) (multiple answers are possible):

b. you uninstalled any previous Python distribution (including the
official .msi)

What steps will reproduce the problem?
1. Start the installation process
2.
3.

What is the expected output? What do you see instead?
Expected output is that the installation runs correctly and Python 2.7 is 
installed.
During the installation process i get a lot of warnings that "Python 2.7 is not 
installed on your computer". A few other warnings read "PyQt4 is not installed 
on your computer". 
When the installation is finished (after i clicked every warning away by "Ok") 
a folder C:\Python27 is created. It contains a folder "Lib" which itself 
contains one empty subfolder "idlelib" and one subfolder "site-packages". This 
has the file "xyinstall.py" in it. 

Please provide any additional information below.
Before i tried installing Pythonxy i had Python 3.3.0 installed. I removed by 
the Windows uninstallation routine.

Original issue reported on code.google.com by J.Send...@web.de on 13 Feb 2013 at 10:39

adirschlezinger / pythonxy

Python(x,y) does not install - Python 2.7/PyQt4 is not installed on your computer #603