Previously I wrote an article on Microsoft Started Working on Windows 7 Service Pack 1. According to Wzor, Microsoft has already compiles a new build for Service Pack 1 of Windows 7. It’s a big surprise because Microsoft has never start work on service pack of operating system before its final release.

One reason behind this secret may Microsoft have planned much more than what we have seen in Latest Windows 7 RC and to avoid any possible delay in releasing Windows 7 Microsoft may have dropped number of features from final Windows 7 RTM release and planned to include in Windows 7 SP1.

Windows 7 Service Pack 1 Build Details:

• 7139.0.winmain_win7ids_sp.090526-xxxx
• 7140.0.winmain_win7ids_sp.090527-xxxx
• 7141.0.winmain_win7ids_sp.090528-xxxx

Screenshots of Windows 7 Service Pack 1 (from Wzor):

Windows 7 Build 7138.winmain_win7ids_sp.090523-2200:

Windows 7 Build 7138 x86 SP1

Windows 7 Build 7138 x64 SP1

Via