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The list of supported guest OSs from TechNet for WS2012 Hyper-V is listed below. If this is like W2008 R2, the TechNet list will remain static while the actual supported list will be accurately reflected on TechNet Wiki.
| Guest Operating System (Server) | Notes |
| Windows Server 2012 | Integration services do not require a separate installation because they are built-in. |
| Windows Server 2008 R2 with Service Pack 1 (SP 1) | Datacenter, Enterprise, Standard and Web editions. Install the integration services after you set up the operating system in the virtual machine. |
| Windows Server 2008 R2 | Datacenter, Enterprise, Standard and Web editions. Upgrade the integration services after you set up the operating system in the virtual machine. |
| Windows Server 2008 with Service Pack 2 (SP 2) | Datacenter, Enterprise, Standard and Web editions (32-bit and 64-bit). Install the integration services after you set up the operating system in the virtual machine. |
| Windows Server 2008 | Datacenter, Enterprise, Standard and Web editions (32-bit and 64-bit). Install the integration services after you set up the operating system in the virtual machine. |
| Windows Home Server 2011 | Edition information is not applicable. Install the integration services after you set up the operating system in the virtual machine. |
| Windows Small Business Server 2011 | Essentials and Standard editions. Install the integration services after you set up the operating system in the virtual machine. |
| Windows Server 2003 R2 with Service Pack 2 (SP2) | Standard, Web, Enterprise, and Datacenter editions (32-bit and 64-bit). Install the integration services after you set up the operating system in the virtual machine. |
| Windows Server 2003 with Service Pack 2 | Standard, Web, Enterprise, and Datacenter editions (32-bit and 64-bit). Install the integration services after you set up the operating system in the virtual machine. |
| CentOS 6.0 – 6.2 | Download and install Linux Integration Services v3.3. |
| Red Hat Enterprise Linux 6.0 –6.2 | Download and install Linux Integration Services v3.3. |
| SUSE Linux Enterprise Server 11 SP2 | Integration services do not require a separate installation because they are built-in. |
Note: The TechNet article indicates you should use Linux Integration Services v3.2 but they have been superseded by v3.3.
And for the client operating systems (VDI):
| Guest Operating System (Client) | Notes |
| Windows 8 Release Preview | Integration services do not require a separate installation because they are built-in. |
| Windows 7 with Service Pack 1 (SP 1) | Ultimate and Enterprise editions (32-bit and 64-bit). Upgrade the integration services after you set up the operating system in the virtual machine. |
| Windows 7 | Ultimate and Enterprise editions (32-bit and 64-bit). Upgrade the integration services after you set up the operating system in the virtual machine. |
| Windows Vista with Service Pack 2 (SP2) | Business, Enterprise, and Ultimate, including N and KN editions. Install the integration services after you set up the operating system in the virtual machine. |
| Windows XP with Service Pack 3 (SP3) | Professional. Install the integration services after you set up the operating system in the virtual machine. |
| Windows XP x64 Edition with Service Pack 2 (SP 2) | Professional. Install the integration services after you set up the operating system in the virtual machine. |
Remember that even built-in integration services will have to be upgraded at a later time, e.g. for WS2012 Service Pack 1 if/when it comes out.