# TIP: Unblock ISOs and Customization Package Zips before using

**URL:** <https://community.criticalmanufacturing.com/t/tip-unblock-isos-and-customization-package-zips-before-using/677>\
**Category:** Deployment\
**Tags:** installation, v11.3\
**Created:** [March 16, 2023, 5:28pm UTC](https://community.criticalmanufacturing.com/t/tip-unblock-isos-and-customization-package-zips-before-using/677 "2023-03-16T17:28:16Z")\
**Posts on this page:** 4\
**Page:** 1

<div class="post-metadata">

**Author:** ![Joao\_Moreira](https://avatars.discourse-cdn.com/v4/letter/j/b9bd4f/32.png) [@Joao\_Moreira](https://community.criticalmanufacturing.com/u/Joao_Moreira)\
**Post date:** [March 16, 2023, 5:28pm UTC](https://community.criticalmanufacturing.com/t/tip-unblock-isos-and-customization-package-zips-before-using/677/1 "2023-03-16T17:28:16Z")

</div>

Before installing/updating a MES environment ensure that your ISO and/or customization zip packages were not blocked, otherwise unexpected issues may raise during or afterwards the installation.

e.g.:

- Blocked ISO files usually cause instalaltion powershell scripts to fail;
- Blocked customization zip files, will make any files that are extracted from them inherit this flag. Causing for instance MES Hosting Services to run, but not be able to load the customization dlls.

To unblock the a file use one of the following options:

- **Option 1** : Open explorer, acess the file properties and click the “Unblock” button
- **Option 2** : Use the following powershell command as admin: _ **dir \<expr\_to\_find\_file\> | Unblock-File** _

_ **Important** _: Unblock ISO files before mounting them.

---

<div class="post-metadata">

**Author:** ![Joao\_Moreira](https://avatars.discourse-cdn.com/v4/letter/j/b9bd4f/32.png) [@Joao\_Moreira](https://community.criticalmanufacturing.com/u/Joao_Moreira)\
**Post date:** [March 16, 2023, 5:28pm UTC](https://community.criticalmanufacturing.com/t/tip-unblock-isos-and-customization-package-zips-before-using/677/2 "2023-03-16T17:28:26Z")

</div>

**e.g.:** of the properties of a blocked file:

 ![](https://canada1.discourse-cdn.com/flex050/uploads/community_criticalmanufacturing/original/1X/a484adbf2a2498236bd24b6578663ffc8dd46945.png)

---

<div class="post-metadata">

**Author:** ![Joao\_Moreira](https://avatars.discourse-cdn.com/v4/letter/j/b9bd4f/32.png) [@Joao\_Moreira](https://community.criticalmanufacturing.com/u/Joao_Moreira)\
**Post date:** [March 16, 2023, 5:30pm UTC](https://community.criticalmanufacturing.com/t/tip-unblock-isos-and-customization-package-zips-before-using/677/3 "2023-03-16T17:30:24Z")

</div>

This issue occurs when Windows Attachment Manager marks files as blocked. Check the following link for more details:

[https://support.microsoft.com/en-us/topic/information-about-the-attachment-manager-in-microsoft-windows-c48a4dcd-8de5-2af5-ee9b-cd795ae42738](https://support.microsoft.com/en-us/topic/information-about-the-attachment-manager-in-microsoft-windows-c48a4dcd-8de5-2af5-ee9b-cd795ae42738)))

---

<div class="post-metadata">

**Author:** ![system](https://yyz2.discourse-cdn.com/flex050/user_avatar/community.criticalmanufacturing.com/system/32/23_2.png) [@system](https://community.criticalmanufacturing.com/u/system)\
**Post date:** [August 27, 2026, 5:25pm UTC](https://community.criticalmanufacturing.com/t/tip-unblock-isos-and-customization-package-zips-before-using/677/4 "2026-08-27T17:25:21Z")

</div>

This topic was automatically closed 2 days after the last reply. New replies are no longer allowed.