Following is the list of supported operating systems for SQL Server 2008 Standard edition:
SQL Server 2008 Standard (64-bit) x64:
Windows XP Professional x64
Windows Server 2003 SP2 64-bit x64 Standard
Windows Server 2003 SP2 64-bit x64 Datacenter
Windows Server 2003 SP2 64-bit x64 Enterprise
Windows Vista Ultimate x64
Windows Vista Enterprise x64
Windows Vista Business x64
Windows Server 2008 x64 Web
Windows Server 2008 x64 Standard, Windows Server 2008 x64 Standard without Hyper-V1
Windows Server 2008 x64 Datacenter, Windows Server 2008 x64 Datacenter without Hyper-V1
Windows Server 2008 x64 Enterprise, Windows Server 2008 x64 Enterprise without Hyper-V1
Windows Small Business Server 2008
Windows Server 2008 for Windows Essential Server Solutions
Windows Server 2008 without Hyper-V for Windows Essential Server Solutions
Windows 7 64-bit x64 Ultimate
Windows 7 64-bit x64 Enterprise
Windows 7 64-bit x64 Professional
Windows 2008 R2 64-bit x64 Web
Windows 2008 R2 Foundation Server
Windows 2008 R2 64-bit x64 Standard
Windows 2008 R2 64-bit x64 Enterprise
Windows 2008 R2 64-bit x64 Datacenter
SQL Server 2008 Standard (32-bit):
Windows XP Professional SP2
Windows XP SP2 Tablet
Windows XP x64 Professional
Windows XP SP2 Media Center 2002
Windows XP SP2 Media Center 2004
Windows XP Media Center 2005
Windows XP Professional Reduced Media
Windows Server 2003 SP2 Small Business Server R2 Standard
Windows Server 2003 SP2 Small Business Server R2 Premium
Windows Server 2003 SP2 Standard
Windows Server 2003 SP2 Enterprise
Windows Server 2003 SP2 Datacenter
Windows Server 2003 SP2 Small Business Server Standard
Windows Server 2003 SP2 Small Business Server Premium
Windows Server 2003 SP2 64-bit x64 Standard
Windows Server 2003 SP2 64-bit x64 Datacenter
Windows Server 2003 SP2 64-bit x64 Enterprise
Windows Vista Ultimate
Windows Vista Enterprise
Windows Vista Business
Windows Vista Ultimate x64
Windows Vista Enterprise x64
Windows Vista Business x64
Windows Server 2008 Web
Windows Server 2008 Standard Server
Windows Server 2008 Standard Server without Hyper-V
Windows Server 2008 Datacenter
Windows Server 2008 Datacenter without Hyper-V
Windows Server 2008 Enterprise
Windows Server 2008 Enterprise without Hyper-V
Windows Server 2008 x64 Standard
Windows Server 2008 x64 Standard without Hyper-V1
Windows Server 2008 x64 Datacenter
Windows Server 2008 x64 Datacenter without Hyper-V1
Windows Server 2008 x64 Enterprise
Windows Server 2008 x64 Enterprise without Hyper-V1
Windows Small Business Server 2008
Windows Server 2008 for Windows Essential Server Solutions
Windows Server 2008 without Hyper-V for Windows Essential Server Solutions2
Windows 7 Ultimate
Windows 7 Enterprise
Windows 7 Professional
Windows 7 64-bit x64 Ultimate
Windows 7 64-bit x64 Enterprise
Windows 7 64-bit x64 Professional
Windows Server 2008 R2 64-bit x64 Web
Windows Server 2008 R2 Foundation Server
Windows Server 2008 R2 64-bit x64 Standard
Windows Server 2008 R2 64-bit x64 Enterprise
Windows Server 2008 R2 64-bit x64 Datacenter