求助，我下安装 CE42.exe 时，出现下面的错误

lsh998

请教：
我下载了一个 WINCE 4.2 ,可是我单击 CE42.exe 时，出现下面的错误：
The Installscript enginge is missing from this machine,if  available,please run ISScript.msi,
or contact your support personnel for further assistance.

我在微软的网站上找到下面的信息：
symptoms
when you try to install virtual pc 2004,you receive the following error message:
The Installscript enginge is missing from this machine,if  available,please run ISScript.msi,
or contact your support personnel for further assistance.

cause:
this issue occurs if you try to start virtual pc setup by using the microsoft virtual
pc 2004.msi file from virtual pc CD.
resolution:
to resolve this issue ,start virtual pc setup by using the setup.exe program,when you
run then setup.exe from the virtual pc CD,setup.exe automatically updates the windows
installer to the version that you need to install virtual pc 2004.

各位大哥，我是错在哪里啊？
要怎么改正呢？
                                  礼致！