Microsoft Office Professional Plus 2010 :
Operating System : Supports only the 32-bit edition of Office 2010:
Windows XP with Service Pack 3 (SP3)
Windows Server 2003 Service Pack 2 (SP2), MSXML 6.0
Windows Server 2003 R2
Supports both 32-bit or 64-bit editions of Office 2010:
Windows Vista with Service Pack 1 (SP1)
Windows 7
Windows 8
Windows Server 2008
Windows Server 2008 SP2
Windows Server 2008 R2
Windows Server 2008 R2 SP1
Windows Server 2012
Doesn't support any edition of Office 2010:
Windows Server 2003, 64-bit
Windows XP, 64-bit
Processor : 500-megahertz (MHz) processor or higher; 1 gigahertz (GHz)
HDD : 3.5 gigabyte (GB) available disk space.
RAM : 256 megabytes (MB) of RAM or higher; 512 MB recommended for graphics features,
Display : 1024 × 768 or higher
