OSDBuilder (19.3.12) supports updating Windows 7 SP1 (version 6.1.7601.17514 or newer). Creating an OSBuild (Customized) is not supported
OSDBuilder has only been tested with importing and updating Windows 7 Enterprise with SP1 (February 15, 2011). If you do not use this version, expect inconsistent results. The ISO can be downloaded from MVLS (Microsoft Volume Licensing Service Center)
Import the ISO using Import-OSMedia. Do not use the UpdateOSMedia parameter, it is blocked for Legacy Operating Systems
Use the following command to select and download the updates. Be aware of Optional Updates and whether they are necessary. It is recommended that you download everything
Virtual PC for Windows 7 x64 KB958559RSAT for Windows 7 x64 KB958830Update for Windows 7 for x64-based Systems (KB2732059)Update for Windows 7 for x64-based Systems (KB2750841)Update for Windows 7 for x64-based Systems (KB2786081)Platform Update for Windows 7 x64-Edition (KB2670838)Update for Windows 7 for x64-based Systems (KB2592687)Update for Windows 7 for x64-based Systems (KB2574819)Update for Windows 7 for x64-based Systems (KB2834140)Cumulative Security Update for ActiveX Killbits for Windows 7 for x64-based Systems (KB2900986)Security Update for Windows 7 for x64-based Systems (KB2862330)Update for Windows 7 for x64-based Systems (KB2919469)Update for Windows 7 for x64-based Systems (KB2830477)Update for Windows 7 for x64-based Systems (KB2830477)Update for Windows 7 for x64-based Systems (KB2923545)Internet Explorer 11 for Windows 7 for x64-based Systems (KB2841134)Update for Windows 7 for x64-based Systems (KB2761217)Update for Windows 7 for x64-based Systems (KB2545698)Update for Windows 7 for x64-based Systems (KB2547666)Update for Windows 7 for x64-based Systems (KB2603229)Security Update for Windows 7 for x64-based Systems (KB2698365)Update for User-Mode Driver Framework version 1.11 for Windows 7 for x64-based Systems (KB2685813)Update for Windows 7 for x64-based Systems (KB2729094)Security Update for Windows 7 for x64-based Systems (KB2813347)Update for Windows 7 for x64-based Systems (KB2773072)Security Update for Windows 7 for x64-based Systems (KB2667402)Security Update for Windows 7 for x64-based Systems (KB2706045)Security Update for Microsoft .NET Framework 3.5.1 on Windows 7 and Windows Server 2008 R2 SP1 for x64-based Systems (KB2894844)Update for Kernel-Mode Driver Framework version 1.11 for Windows 7 for x64-based Systems (KB2685811)Update for Windows 7 for x64-based Systems (KB2970228)Security Update for Windows 7 for x64-based Systems (KB2984972)Security Update for Windows 7 for x64-based Systems (KB3020388)Update for Windows 7 for x64-based Systems (KB3021917)Update for Windows 7 for x64-based Systems (KB3006137)Update for Windows 7 for x64-based Systems (KB3037623)Security Update for Windows 7 for x64-based Systems (KB3035126)Security Update for Windows 7 for x64-based Systems (KB3046269)Update for Windows 7 for x64-based Systems (KB3020369)Security Update for Windows 7 for x64-based Systems (KB3031432)Update for Windows 7 for x64-based Systems (KB3068708)Security Update for Windows 7 for x64-based Systems (KB3059317)Security Update for Windows 7 for x64-based Systems (KB3078601)Security Update for Windows 7 for x64-based Systems (KB3075226)Update for Windows 7 for x64-based Systems (KB3080149)Security Update for Windows 7 for x64-based Systems (KB3110329)Update for Windows 7 for x64-based Systems (KB3102429)Update for Windows 7 for x64-based Systems (KB3138612)Security Update for Windows 7 for x64-based Systems (KB3155178)Security Update for Windows 7 for x64-based Systems (KB3156016)Security Update for Windows 7 for x64-based Systems (KB3150220)Update for Windows 7 for x64-based Systems (KB3150513)Update for Windows 7 for x64-based Systems (KB3125574)Security Update for Windows 7 for x64-based Systems (KB3159398)Security Update for Windows 7 for x64-based Systems (KB3161949)Update for Windows 7 for x64-based Systems (KB3170735)Update for Windows 7 for x64-based Systems (KB3161102)Update for Windows 7 for x64-based Systems (KB3172605)Update for Windows 7 for x64-based Systems (KB3179573)Update for Windows 7 for x64-based Systems (KB3063109)Update for Windows 7 for x64-based Systems (KB3184143)Security and Quality Rollup for .NET Framework 3.5.1 for Windows 7 x64 (KB4040980)Update for Windows 7 for x64-based Systems (KB2952664)2018-12 Cumulative Security Update for Internet Explorer 11 for Windows 7 for x64-based systems (KB4483187)2019-02 Update for Windows 7 for x64-based Systems (KB4486459)2019-03 Servicing Stack Update for Windows 7 for x64-based Systems (KB4490628)2019-03 Security Update for Windows 7 for x64-based Systems (KB4474419)2019-03 Security Monthly Quality Rollup for Windows 7 for x64-based Systems (KB4489878)2019-03 Cumulative Security Update for Internet Explorer 11 for Windows 7 for x64-based systems (KB4489873)
The only updates remaining can be added Online with minimal effort. Windows 7 Service Pack 1 is just a validation check (9.1MB). Internet Explorer is installed and up to date