尝试运行我的java swing应用程序时，Win Vista上缺少msvcr71.dll文件

I've done numerous searches and I realize that I can just download this file and install it either in windows/system32 or in the application's directory. My question is, how does this dll generally get installed on Vista? I tried installing the .net framework 3.5 and it didn't get installed with that. I've done numerous searches and I realize that