# Installer integrity check fail

**URL:** <https://discourse.slicer.org/t/installer-integrity-check-fail/26966>\
**Category:** Support\
**Created:** [December 28, 2022, 11:48pm UTC](https://discourse.slicer.org/t/installer-integrity-check-fail/26966 "2022-12-28T23:48:05Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![Maksym\_Hladchuk](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/maksym_hladchuk/32/14803_2.png) [@Maksym\_Hladchuk](https://discourse.slicer.org/u/Maksym_Hladchuk)\
**Post date:** [December 28, 2022, 11:48pm UTC](https://discourse.slicer.org/t/installer-integrity-check-fail/26966/1 "2022-12-28T23:48:05Z")

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Hello, i uploaded the picture for the error, pretty much the installer doesnt work and an error message saying installer integrity check fail comes out(NSIS error), i tried downloading both the stable release and the preview one but neither work, someone else had this problem or its probably a problem of my pc?

Thanks a lot for the attention

![NSIS](https://us1.discourse-cdn.com/flex002/uploads/slicer/original/3X/8/b/8bc3b24a96a3323e9543c91022126d7bc9a5287b.png)

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**Author:** ![jcfr](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/jcfr/32/17825_2.png) [@jcfr](https://discourse.slicer.org/u/jcfr)\
**Post date:** [December 29, 2022, 6:12am UTC](https://discourse.slicer.org/t/installer-integrity-check-fail/26966/2 "2022-12-29T06:12:35Z")

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### Verifying checksum

Windows installer is expected to have its checksum (SHA512) be:

```auto
1c71bf558ebdb37e39dcdbb6109f7ec1787feb7c463880025c9835345ba6672775fa1e879e1f4e8319711fd497741e82179cd8e7572b0341de34f0103a02b09c

```

Could you confirm the package you downloaded is not corrupted ?

To compute the checksum associated with the file you locally downloaded, here are the steps:

1. Start power shell

2. Adapt and run the following command:

```auto
Get-Filehash -path c:\path\to\Downloads\Slicer-5.2.1-win-amd64.exe -algorithm SHA512 | fl

```

### Looking up expected checksum

Waiting we improve the download site to explicitly list the checksum, you may be able to identify the checksum of specific packages going to `https://slicer-packages.kitware.com`.

For example, here is how to identify the checksum for `Slicer-5.2.1-win-amd64.exe `

1. Go to [https://slicer-packages.kitware.com/#item/637f7a7f517443dc5dc73276](https://slicer-packages.kitware.com/#item/637f7a7f517443dc5dc73276)

2. Display item infos

 ![image](https://us1.discourse-cdn.com/flex002/uploads/slicer/original/3X/8/7/8761031abed4083be34797d0311ec4efe8a53989.png)

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<div class="post-metadata">

**Author:** ![Maksym\_Hladchuk](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/maksym_hladchuk/32/14803_2.png) [@Maksym\_Hladchuk](https://discourse.slicer.org/u/Maksym_Hladchuk)\
**Post date:** [December 29, 2022, 10:22am UTC](https://discourse.slicer.org/t/installer-integrity-check-fail/26966/3 "2022-12-29T10:22:48Z")

</div>

Hello,

Thaks you so much for your detailed answer, my first downloads were corrupted, i usually use an application for my downloads, and apparently it didn’t work for the installer of slicer, by using the browser to download(google) it worked, im sorry for the inconvenience, i never had this problem with the download app.