# 3D Slicer cannot be installed in Windows 11

**URL:** https://discourse.slicer.org/t/3d-slicer-cannot-be-installed-in-windows-11/47861
**Category:** Support
**Created:** [August 11, 2026, 2:03pm UTC](https://discourse.slicer.org/t/3d-slicer-cannot-be-installed-in-windows-11/47861 "2026-08-11T14:03:10Z")
**Posts on this page:** 2
**Page:** 1

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### Author: ![Abdoelabassi](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/abdoelabassi/32/82705_2.png) [@Abdoelabassi](https://discourse.slicer.org/u/Abdoelabassi)
#### Post date: [August 11, 2026, 2:03pm UTC](https://discourse.slicer.org/t/3d-slicer-cannot-be-installed-in-windows-11/47861/1 "2026-08-11T14:03:10Z")

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I downloaded the installer, but the integrity check of Win11 has failed. Common causes include an incomplete download (which is unlikely, because the download was healthy and complete) and damaged media.

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### Author: ![muratmaga](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/muratmaga/32/3622_2.png) [@muratmaga](https://discourse.slicer.org/u/muratmaga)
#### Post date: [August 12, 2026, 3:17am UTC](https://discourse.slicer.org/t/3d-slicer-cannot-be-installed-in-windows-11/47861/2 "2026-08-12T03:17:56Z")

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I just installed the current 5.12.3 on two different Windows 11 machines today. it is also the version of slicer that’s most heavily used, and so far no one else reported this. This points out a problem on your network.

Do you have an antivirus or overzealous security environment? Most likely something between the your computer and [download.slicer.org](http://download.slicer.org) is tampering with the package and corrupting it. If you have the option either temporarily disable them, or download the installer some other computer and copy to yours.