问题描述：
ArcMap unexpectedly exits during the "Loading Document..." stage on startup. No error code is displayed.
ArcMap在启动“Loading Document...”阶段异常退出。无错误代码显示。
原因：
This can result from an upgrade to Python 2.7.11, which was released on December 12, 2015.
In the newly released version, there is a line in the code that makes the following statement, where 'PyWin_DLLVersionString' now is "2.7-32".
This statement searches for the registry key HKEY_LOCAL_MACHINESOFTWAREWow6432NodePythonPythonCore2.7-32PythonPath, which does not exist.
导致该问题的原因为升级到Python 2.7.11版本，发布于2015年12月12号。
在新的发布版本中，有一行代码使用了如下语句： 'PyWin_DLLVersionString' 现在是 "2.7-32"。
该语句搜索注册表键：HKEY_LOCAL_MACHINESOFTWAREWow6432NodePythonPythonCore2.7-32PythonPath，不存在。
解决方案：
修改注册表中关于Python目录的设置的根键的名称：从“2.7”==》“2.7-32”，方法步骤如下：
1. Click Start > Run, and type 'regedit'. Navigate to
HKEY_LOCAL_MACHINESOFTWAREWow6432NodePythonPythonCore2.7
2. Right-click the 2.7 folder and select Rename. Rename the '2.7' folder to '2.7-32'.
3. When this is completed, the path must look like this:
HKEY_LOCAL_MACHINESOFTWAREWow6432NodePythonPythonCore2.7-32
4. Close the Registry Editor and open ArcMap.
详见：
http://support.esri.com/cn/knowledgebase/techarticles/detail/45924