# Can't start new Slicer

**URL:** <https://discourse.slicer.org/t/cant-start-new-slicer/19763>\
**Category:** Community\
**Tags:** python\
**Created:** [September 20, 2021, 3:04pm UTC](https://discourse.slicer.org/t/cant-start-new-slicer/19763 "2021-09-20T15:04:00Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![slicer365](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/slicer365/32/67549_2.png) [@slicer365](https://discourse.slicer.org/u/slicer365)\
**Post date:** [September 20, 2021, 3:04pm UTC](https://discourse.slicer.org/t/cant-start-new-slicer/19763/1 "2021-09-20T15:04:01Z")

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[https://us1.discourse-cdn.com/flex002/uploads/slicer/original/3X/2/6/26b8a8483078d7e04c3b8811c53c510e171d05e7.mp4](https://us1.discourse-cdn.com/flex002/uploads/slicer/original/3X/2/6/26b8a8483078d7e04c3b8811c53c510e171d05e7.mp4)

Current version 4.13 0918  
win7 64

what‘s wrong with my computer? The version 4.11 0226 can run normally.

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**Author:** ![jamesobutler](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/jamesobutler/32/7511_2.png) [@jamesobutler](https://discourse.slicer.org/u/jamesobutler)\
**Post date:** [September 20, 2021, 3:56pm UTC](https://discourse.slicer.org/t/cant-start-new-slicer/19763/2 "2021-09-20T15:56:10Z")

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[https://slicer.readthedocs.io/en/latest/user\_guide/getting\_started.html#system-requirements](https://slicer.readthedocs.io/en/latest/user_guide/getting_started.html#system-requirements)

^ Based on the linked 3D Slicer system requirements, Windows 10 is the minimum supported version for latest versions of 3D Slicer. As shown in your video, you are using Windows 7. Windows 7 went [End-of-Life](https://www.microsoft.com/en-us/microsoft-365/windows/end-of-windows-7-support) on January 14th, 2020 so it is no longer a version being tested for Slicer and development resources will not be provided to fixing issues associated with that version.

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**Author:** ![jamesobutler](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/jamesobutler/32/7511_2.png) [@jamesobutler](https://discourse.slicer.org/u/jamesobutler)\
**Post date:** [September 20, 2021, 4:07pm UTC](https://discourse.slicer.org/t/cant-start-new-slicer/19763/3 "2021-09-20T16:07:58Z")

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Also see the following response

> [@Application failed to start on Windows 7](https://discourse.slicer.org/t/application-failed-to-start-on-windows-7/16749/2):
>
> Windows 7 is not supported (Microsoft dropped support for it long time ago). We have not made any breaking changes intentionally, but we don’t test impact of changes on these old systems. It is not very likely that you can get help from the community to troubleshoot this, so if running Slicer on Windows7 is a priority for you and you cannot resolve the problem yourself then you may contract [commercial partners](https://slicer.readthedocs.io/en/latest/user_guide/about.html#commercial-partners) to investigate the issue. I would recommend to upgrade the operating system on your c…