# 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:** 1\
**Showing post:** 3

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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…

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_[View the full topic](https://discourse.slicer.org/t/cant-start-new-slicer/19763)._