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It is important for you to be able to identify whether or not you have the SP1 already installed, or successfully installed after your attempt to install. Press the Windows Key + R and type cmd.exe to get to a command shell. Type the command "winver" and press enter. It is important for you to be able to identify whether or not you have the SP1 already installed, or successfully installed after your attempt to install. Press the '''Windows Key + R''' and type the command "'''winver'''" and press enter. See: [https://support.microsoft.com/en-us/kb/2700601 Microsoft KB-2700601]=== TRUST_E_NOSIGNATURE(0x800b0100) ===CheckSUR.log says Unavailable Repair Files. The Component Store that contains information about Windows components has been corrupted KB2522422 https://www.microsoft.com/en-us/download/details.aspx?id=14826 http://www.microsoft.com/en-us/download/details.aspx?id=19953 Windows6.1-KB2522422-x64.msu There was a microsoft update installed that is a fix for certain Canon brand printers. (KB2522422) "Cannot print from Internet Explorer 9 using some Canon printers " Turn Windows Features on or off is blank or empty* [http://blogs.technet.com/b/joscon/archive/2010/05/26/using-checksur-and-update-packages-to-fix-corruption.aspx Using CheckSUR and update packages to fix corruption] - joscon [Microsoft] 26 May 2010 6:37 AM=== See Also ===* [[Annoyances of Windows Vista and Windows 7]]* [[Windows 7 Tips & Tricks]]