Martin Loewis had me start IDLE from a DOS prompt. The backtrace pointed to an improper installation of tcl.
Facundo Batista <facundo@taniquetil.com.ar> added the comment:
Disable all Operating System firewalls and try again (remember to enable
the firewalls again after the test).
This was a common problem in WinXP
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nosy: +facundobatista
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Tracker <report@bugs.python.org>
<http://bugs.python.org/issue2714>
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