我刚给scom2012R2 装上了rollup13，发现装错了，要装的是rollup12，然后想把rollup13卸掉，搜了一篇文档，但是看不懂，路径如下：
Uninstall information
To uninstall an update, run the following command:
msiexec /uninstall PatchCodeGuid /package RTMProductCodeGuid
https://support.microsoft.com/en-us/topic/update-rollup-13-for-system-center-2012-r2-operations-manager-0743b6e3-e63f-11a4-e688-5009d927507c
不知道该怎么用