# Unreal Engine won't launch Error code (0xc000007b)

**URL:** <https://forums.unrealengine.com/t/unreal-engine-wont-launch-error-code-0xc000007b/277486>\
**Category:** Getting Started & Setup\
**Tags:** error, unreal-engine, Installation, question\
**Created:** [March 20, 2014, 6:27am UTC](https://forums.unrealengine.com/t/unreal-engine-wont-launch-error-code-0xc000007b/277486 "2014-03-20T06:27:08Z")\
**Posts on this page:** 4\
**Page:** 4

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**Author:** ![anonymous\_user\_0837b42c1](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@anonymous\_user\_0837b42c1](https://forums.unrealengine.com/u/anonymous_user_0837b42c1)\
**Post date:** [July 21, 2014, 11:26pm UTC](https://forums.unrealengine.com/t/unreal-engine-wont-launch-error-code-0xc000007b/277486/61 "2014-07-21T23:26:18Z")

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Actually, I didn’t catch this from your log earlier: Are you running Windows Vista or a version of windows that is older than windows 7? I believe minimum supported windows OS is Windows 7 64-bit as described here: [Häufig gestellte Fragen - Unreal Engine](https://www.unrealengine.com/faq)

Perhaps that is root of issue?

If your OS meets minimum requirements then you could see if your version of Windows supports a ‘repair’ option.

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**Author:** ![swordmac](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@swordmac](https://forums.unrealengine.com/u/swordmac)\
**Post date:** [July 21, 2014, 11:34pm UTC](https://forums.unrealengine.com/t/unreal-engine-wont-launch-error-code-0xc000007b/277486/62 "2014-07-21T23:34:59Z")

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im running Windows 7

![10848-pc.png](https://d3kjluh73b9h9o.cloudfront.net/original/4X/5/5/d/55df8201cc743df233d7bcb41672bec1c72dc392.png)

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<div class="post-metadata">

**Author:** ![anonymous\_user\_0837b42c1](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@anonymous\_user\_0837b42c1](https://forums.unrealengine.com/u/anonymous_user_0837b42c1)\
**Post date:** [July 30, 2014, 9:07pm UTC](https://forums.unrealengine.com/t/unreal-engine-wont-launch-error-code-0xc000007b/277486/63 "2014-07-30T21:07:55Z")

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Just checking in. Did you try Windows repair option? Any luck?

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**Author:** ![Keksmania](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@Keksmania](https://forums.unrealengine.com/u/Keksmania)\
**Post date:** [October 7, 2014, 10:57pm UTC](https://forums.unrealengine.com/t/unreal-engine-wont-launch-error-code-0xc000007b/277486/64 "2014-10-07T22:57:03Z")

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Had same issue. It’s fixed now

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