Get Official Direct Download Link Of Windows 7 Ultimate SP1 ISO. This Version of windows OS are latest version , comes with sp1 and you can try another version of Windows with SP 1 Update
Windows 7 Ultimate SP1-U ISO
English x86: http://msft.digitalrivercontent.net/win/X17-59463.iso
English x64: http://msft.digitalrivercontent.net/win/X17-59465.iso
Windows 7 Professional SP1-U ISO
English x86: http://msft.digitalrivercontent.net/win/X17-59183.iso
English x64: http://msft.digitalrivercontent.net/win/X17-59186.iso
Windows 7 Professional N SP1-U ISO (Note: N editions come without media components)
English x86: http://msft.digitalrivercontent.net/win/X17-59335.iso
English x64: http://msft.digitalrivercontent.net/win/X17-59337.iso
Windows 7 Home Premium SP1-U ISO
English x86: http://msft.digitalrivercontent.net/win/X17-58996.iso
English x64: http://msft.digitalrivercontent.net/win/X17-58997.iso
English x86: http://msft.digitalrivercontent.net/win/X17-59183.iso
English x64: http://msft.digitalrivercontent.net/win/X17-59186.iso