Error when I try to create cluster in Windows 7 Service Pack 1

I was able to create the cluster using

> ccm.py create -v 3.0.0 -n 3 my_cluster --vnodes

However, when I tried to start the nodes

> ccm.py start
> I got the following error:

Traceback (most recent call last):
File "C:\Python27\Scripts\ccm.py", line 4, in
**import**('pkg_resources').run_script('ccm==2.4.2', 'ccm.py')
File "C:\Python27\lib\site-packages\pkg_resources__init__.py", line 719, in run_script
self.require(requires)[0].run_script(script_name, ns)
File "C:\Python27\lib\site-packages\pkg_resources__init__.py", line 1511, in run_script
exec(script_code, namespace, namespace)
File "C:\Python27\lib\site-packages\ccm-2.4.2-py2.7.egg\EGG-INFO\scripts\ccm.py", line 90, in

File "build\bdist.win-amd64\egg\ccmlib\cmds\cluster_cmds.py", line 593, in run
File "build\bdist.win-amd64\egg\ccmlib\cluster.py", line 391, in start
File "build\bdist.win-amd64\egg\ccmlib\node.py", line 644, in start
File "build\bdist.win-amd64\egg\ccmlib\node.py", line 1706, in __clean_win_pid
Exception: Timed out waiting for pid file.

Please help...

Reproduce the reported `ccm.py create` and `ccm.py start` commands on Windows 7 SP1. Start at `ccmlib/node.py` in `__clean_win_pid`, where the traceback reports the pid-file timeout; done means the nodes start without that exception.

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