resolution:
The MSI Installer can be a real pain. It may be that one of the files required by it is corrupt. Here's what you do. Run msiexec /unregserver again. Then delete msiexec.exe from the system32 directory. Potentially, you could rerun the install at this point but for some reason this doesn't always work. Instead, download a fresh copy of the windows installer, use an unzipping tool to extract it, go into the folder and manually install from the inf files. To do this, right click on it and select install. Make sure you do msi.inf first, and then mspatcha.inf or you get a missing file error (likely because msiexec.exe is missing). After all this run msiexec.exe /regserver to recreate the service.
一、先用msiexec /unregserver 停掉windows installer服务。
二、下载InstMsiW.exe,用winrar解压开。进入目录。
三、右击msi.inf ,点击安装,右击mspatcha.inf ,点击安装。
四、再用msiexec.exe /regserver 启用服务。
问题二:
以上的问题解决后,在我安装vpc的时候,又碰到这个问题:Error -1607: Unable to Install InstallShield Scripting Run Time
查了相关的资料后,发现我安装的系统里没有ISScript.exe.
所以我下载并更新了IkernelUpdate.exe and IsScript7x.zip...问题就解决了。