我有一台安装了 Windows 7 的 PC，这样我就有一台干净的 PC 来玩我心爱的汤姆克兰西游戏。但是，每当我尝试安装 DirectX 9.0c 时，我都会收到错误an internal system error occurred
经检查DXError.log我发现：
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[09/05/15 18:23:21] module: dxupdate(Mar 30 2011), file: dxupdate.cpp, line: 5738, function: DirectXUpdateInstallPlugIn
Failed API: SetupIterateCabinet()
Error: (1224) - The requested operation cannot be performed on a file with a user-mapped section open.
Unable to iterate through C:\dx\Jun2007_XACT_x64.cab. The file may be damaged.
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[09/05/15 18:23:21] module: dsetup32(Mar 30 2011), file: dxupdate.cpp, line: 280, function: CSetup::InstallPlugIn
DirectXUpdateInstallPlugIn() failed.
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[09/05/15 18:23:21] module: dsetup32(Mar 30 2011), file: setup.cpp, line: 1727, function: CSetup::SetupForDirectX
InstallPlugIn() failed.
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[09/05/15 18:25:46] module: DXSetup(Mar 30 2011), file: dxsetup.cpp, line: 935, function: FindDXSetupWindow
Failed API: GetWindowText()
Error: (183) - Cannot create a file when that file already exists.
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[09/05/15 18:28:30] module: dxupdate(Mar 30 2011), file: dxupdate.cpp, line: 5738, function: DirectXUpdateInstallPlugIn
Failed API: SetupIterateCabinet()
Error: (1224) - The requested operation cannot be performed on a file with a user-mapped section open.
Unable to iterate through C:\dx\Aug2007_XACT_x64.cab. The file may be damaged.
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[09/05/15 18:28:30] module: dsetup32(Mar 30 2011), file: dxupdate.cpp, line: 280, function: CSetup::InstallPlugIn
DirectXUpdateInstallPlugIn() failed.
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[09/05/15 18:28:30] module: dsetup32(Mar 30 2011), file: setup.cpp, line: 1727, function: CSetup::SetupForDirectX
InstallPlugIn() failed.
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[09/05/15 18:28:53] module: dxupdate(Mar 30 2011), file: dxupdate.cpp, line: 5738, function: DirectXUpdateInstallPlugIn
Failed API: SetupIterateCabinet()
Error: (1224) - The requested operation cannot be performed on a file with a user-mapped section open.
Unable to iterate through C:\dx\Nov2007_X3DAudio_x64.cab. The file may be damaged.
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[09/05/15 18:28:53] module: dsetup32(Mar 30 2011), file: dxupdate.cpp, line: 280, function: CSetup::InstallPlugIn
DirectXUpdateInstallPlugIn() failed.
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[09/05/15 18:28:53] module: dsetup32(Mar 30 2011), file: setup.cpp, line: 1727, function: CSetup::SetupForDirectX
InstallPlugIn() failed.
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[09/05/15 18:33:38] module: dxupdate(Mar 30 2011), file: dxupdate.cpp, line: 5738, function: DirectXUpdateInstallPlugIn
Failed API: SetupIterateCabinet()
Error: (1224) - The requested operation cannot be performed on a file with a user-mapped section open.
Unable to iterate through C:\dx\Aug2008_XAudio_x64.cab. The file may be damaged.
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[09/05/15 18:33:38] module: dsetup32(Mar 30 2011), file: dxupdate.cpp, line: 280, function: CSetup::InstallPlugIn
DirectXUpdateInstallPlugIn() failed.
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[09/05/15 18:33:38] module: dsetup32(Mar 30 2011), file: setup.cpp, line: 1727, function: CSetup::SetupForDirectX
InstallPlugIn() failed.
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[09/05/15 18:38:13] module: dxupdate(Mar 30 2011), file: dxupdate.cpp, line: 5738, function: DirectXUpdateInstallPlugIn
Failed API: SetupIterateCabinet()
Error: (1224) - The requested operation cannot be performed on a file with a user-mapped section open.
Unable to iterate through C:\dx\Feb2010_XACT_x64.cab. The file may be damaged.
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[09/05/15 18:38:13] module: dsetup32(Mar 30 2011), file: dxupdate.cpp, line: 280, function: CSetup::InstallPlugIn
DirectXUpdateInstallPlugIn() failed.
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[09/05/15 18:38:13] module: dsetup32(Mar 30 2011), file: setup.cpp, line: 1727, function: CSetup::SetupForDirectX
InstallPlugIn() failed.
到目前为止，我已经尝试过：
- 使用 Web 安装程序安装 DirectX
- 使用脱机安装程序安装 DirectX
- 安装全部Windows 更新，然后安装 DirectX
- 删除与 DirectX 关联的 DLL 并安装 DirectX
- 重新启动（多次）并安装 DirectX
我真的不想进行全新安装，因为重新安装所有内容需要花费很多精力。我的系统信息是：
Windows 7 Ultimate x86_64, Retail SKU
GenuineIntel Core i7-4720HQ
8GB DDR3 RAM
NVidia 850M GPU
答案1
答案很简单。从两个都 System32和SysWOW64。我总是删除文件，System32但从来没有SysWOW64。感谢这篇帖子Microsoft 论坛提到了SysWOW64。
了解 DirectX 安装程序无法更新文件的原因是 Steam 正在使用一个SysWOW64阻止安装的文件也可能会有所帮助。