It says...
LMS 4.2 supports the following Windows systems:
•
Windows 2008 Standard Edition Release 1 with SP1 and SP2
•
Windows 2008 Enterprise Edition Release 1 with SP1 and SP2
Note
Only 64-bit Operating Systems is supported on the above versions.
•
Windows Server 2008 R2 Standard Edition with SP1
•
Windows Server 2008 R2 Enterprise Edition with SP1
Note
Only 64-bit Operating Systems are supported on the above versions.