64位Win7安装TortoiseSVN

64位win7安装了TortoiseSVN 后不显示在右键菜单中，开始以为是版本低不支持Win7，查了下TortoiseSVN 的说明，发现FAQ中有这么一个问题：

After installing, TortoiseSVN does not show up, no context menus are available

Make sure you have installed the x64 version of TortoiseSVN if you're using XP or Vista 64-bit. Since the explorer on those OS versions is a 64-bit application, it can not load the 32-bit version of TortoiseSVN.

You can still keep the 32-bit version of TortoiseSVN installed on those OS versions though: it will show up in the 32-bit applications file-open/save dialogs of those applications.

意思是说，64位的系统，其explorer也是64位的，不能加载32位的TortoiseSVN。应该是CPU的问题吧，同进程的两个不同模块，如果字长、寻址模式都不同，是有问题。根据这个，考虑进程的加载器是不是也是这样，如果要运行32位的程序，需要另外一个加载器？

按照这个说法，换64位的TortoiseSVN，安装，一切正常。