.net 4.0安装失败，求救！！！！

lh457

想玩鬼泣5，需要装 .net4.0
日志文件打开是：
OS Version = 6.1.7601, Platform 2, Service Pack 1
OS Description = Windows 7 - x64 Ultimate Edition Service Pack 1

CommandLine = F:\92e87c002d1f9191b713cd\\Setup.exe /x86 /x64


Using Simultaneous Download and Install mechanism


Operation: Installing

Package Name = Microsoft .NET Framework 4 Setup
Package Version = 4.0.30319

User Experience Data Collection Policy: AlwaysUploaded




Number of applicable items: 11






Final Result: Installation failed with error code: (0x80070643), "安装时发生严重错误 " (Elapsed time: 0 00:00:23).




求详细解决办法！！！！！！！！！！