Add Virtual Machine Additions to the library
SCVMM uses VM Additions, software drivers that maximize performance and provide a better user interface (UI) experience within a virtual machine.
1. In Windows Explorer, browse to C:\Program Files\Microsoft Virtual Server\Virtual Machine Additions\. This is the location of the ISO files VMAdditions.iso and Precompact.iso, which will be added to the library server. The Precompact.iso file prepares VHDs to be compacted, and comes with the Virtual Server installation.
2. Create a folder for the files by browsing to \\dc_srv\msscvmmLibrary, creating a new folder there, and naming it ISOs.
3. Select VMAddition and Precompact, and then press Ctrl+C to copy both files.

Figure 112 Select ISO page
4. Open the folder \\dc_srv\msscvmmLibrary\ISOs. Press Ctrl+V to paste the VMAdditions.iso and Precompact.iso files.
5. Open the Virtual Machine Manager console, and then click Library from the quick launch in the left pane.
6. You will now have to refresh the share to see the ISO files that you mounted. On the Managed Library Servers pane on the left, expand Library Server and then expand dc_srv.contoso.com. Right-click MSSCVMMLibrary and click Refresh Share.

Figure 113 SCVMM console
7. The ISOs folder that you created will appear. The files are now able to be used by virtual machines managed by SCVMM.

Figure 114 Refresh Share