The following are the System requirements for Microsoft Office Suite Service Pack 1 (SP1) 2007:
Basic Requirements:
Windows Server 2003 Service Pack 1; Windows Vista; Windows XP Service Pack 2
Additional:
1. Microsoft Installer 3.1 (MSI 3.1) or higher.
2. More free hard disk space than the size of the patch itself.
For specific details, visit the official support site of Microsoft.