As you can see from the desktop context menu, my regional settings are properly set to japanese, so that's not the problem.
Problem details lists the following, but not sure if that helps at all:
Problem signature:
Problem Event Name: APPCRASH
Application Name: ef_Lite_Installer_[nnl].exe
Application Version: 1.0.0.1
Application Timestamp: 4bdb511e
Fault Module Name: StackHash_c15f
Fault Module Version: 0.0.0.0
Fault Module Timestamp: 00000000
Exception Code: c0000096
Exception Offset: 012a2a3b
OS Version: 6.1.7600.2.0.0.768.3
Locale ID: 1033
Additional Information 1: c15f
Additional Information 2: c15f0d173bd2ab097540db7164a48547
Additional Information 3: 431c
Additional Information 4: 431c40eb1ca41bfb4ec5b76dc8bcdc16