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I found that Defrag.exe /G does optimization in a tiered layout, i.e., if you have a storage pool containg HDDs and SSDs, it will do a special defragmentation: Frequently accessed data will be stored on the SSDs and the remaining will be on the HDDs. Check more at What's New in Defrag for Windows Server 2012/2012R2 and at Storage Spaces: How to configure Storage Tiers with Windows Server 2012 R2.
One could use the following command line to install Windows Live Messenger: wlsetup-all.exe /AppSelect:Mail,Messenger,MovieMaker,PhotoGallery /FastOEM /NoHomepage /NoLaunch /NoSearch /Silent The "/NoLaunch" option doesn't add Windows Live Messenger to the HKCU\Software\Microsoft\Windows\CurrentVersion\Run registry key after you install it. I don't know if it makes the default action for every new user that runs it after it is installed, tough. The "/FastOEM" option is for those packages which the source and target volumes are the same; "/NoHomepage" doesn't define the Windows Live as Internet Explorer's home page; "/NoSearch" does the same for the search engine; "/Silent" is for silent/unattended installs. The "/AppSelect" is self-explanatory.