附部分原文：
If your windows OS is installed in C drive, whenever installing new applications, the default suggested installation path is C:\Program Files. If you don’t like to install new applications in the default path for example install in D:\Softwares, instead of changing the path manually each time, you could actually do the simple registry hack to change the default installation path to the one as per desired.
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原文：http://www.jb51.net/os/Vista/11687.html