Cannot obtain read/write access for install.wim

Cannot obtain read/write access for install.wim

In some situations ICD can not do what you need, and because of that, you might still need a good old unattend.xml for Windows 10.

When opening a new install.wim in Windows System Image manager for the first time without a catalog file you will be asked if you want to create a new:

The catalog file for Windows 10 Enterprise Technical Preview cannot be opened for the following reason:

Cannot find the catalog file associated with the Window image Windows 10 Enterprise Technical Preview.

You must have a valid catalog file to continue. Do you want to create a catalog file?”

Technical Preview Smile https://twitter.com/mniehaus/status/666732194807742464

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But when you answer Yes you might see this error:

Cannot obtain read/write access for install.wim.

In order to generate a catalog file, you must have read/write access to The Windows image file and its containing folder.

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One explanation could be that the Install.wim is set to read-only, remove the Read-only mark and try again.

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And the catalog file is now generated:

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Modern Workplace consultant and a Microsoft MVP in Enterprise Mobility.
Modern Workplace consultant and a Microsoft MVP in Windows and Devices for IT.

Infrastructure architect with focus on Modern Workplace and Microsoft 365 security.

Passionate IT professional with 20+ experience in IT architecture, consulting, and design. 

Cloud & security specialist with focus on Microsoft backend products and cloud technologies.

Infrastructure architect with focus on design, implementation, migration and consolidation.

Infrastructure consultant with focus on cloud solutions in Office365 and Azure.

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