MSU文件不支持“/x”类型参数，也不能在Vista之前的系统中运行。要解压缩MSU文件，就需要使用Vista的展开命令，需要用到“-F”参数。
D:|temp>mkdir msu
D:|temp>expand -F:* Windows6.0-KB929761-x86.msu d:|temp|msu
以上命令会输出：
Adding d:|temp|msu|WSUSSCAN.cab to Extraction Queue
Adding d:|temp|msu|Windows6.0-KB929761-x86.cab to Extraction Queue
Adding d:|temp|msu|Windows6.0-KB929761-x86-pkgProperties.txt to Extraction Queue
Adding d:|temp|msu|Windows6.0-KB929761-x86.xml to Extraction Queue
Expanding Files ....
Expanding Files Complete ...
4 files total.
此时.cab文件还未解压缩，仍需要继续，命令如下：
D:|temp>expand -F:* d:|temp|msu|Windows6.0-KB929761-x86.cab d:|temp|msu
Adding d:|temp|msu|update.mum to Extraction Queue
Adding d:|temp|msu|x86_microsoft-windows-wusa_31bf3856ad364e35_6.0.6000.20496_no ne_ab489c6034d78613.manifest to Extraction Queue
Adding d:|temp|msu|x86_microsoft-windows-wusa_31bf3856ad364e35_6.0.6000.16400_no ne_ab1a4f0b1b764fed.manifest to Extraction Queue
Adding d:|temp|msu|update-bf.mum to Extraction Queue
Adding d:|temp|msu|x86_microsoft-windows-wusa.d_31bf3856ad364e35_6.0.6000.20496_ none_4632ef2815ba2cfd.manifest to Extraction Queue
Adding d:|temp|msu|x86_microsoft-windows-wusa.d_31bf3856ad364e35_6.0.6000.16400_ none_4604a1d2fc58f6d7.manifest to Extraction Queue
Adding d:|temp|msu|update.cat to Extraction Queue
Adding d:|temp|msu|update-bf.cat to Extraction Queue
Adding d:|temp|msu|x86_microsoft-windows-wusa_31bf3856ad364e35_6.0.6000.16400_no ne_ab1a4f0b1b764fed|wusa.exe to Extraction Queue
Adding d:|temp|msu|x86_microsoft-windows-wusa_31bf3856ad364e35_6.0.6000.20496_no ne_ab489c6034d78613|wusa.exe to Extraction Queue
Expanding Files ....
Expanding Files Complete ...
10 files total.
(注: 以上路径中的"|"指"/" )