Message 100865 - Python tracker

When I type "set TCL_LIBRARY" it says "TCL_LIBRARY=C:IBMTOOLS\Python22\tcl\tcl18.4".
So I have older version of python on my computer in IBMtools, but I want to use the new Python. How can I uninstall older python, because it can't be found in Start menu and there is no uninstall program in python folder. So how can I uninstall it using command prompt?