# Requirements and Compatibility

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Please note that sometimes, new Windows updates can cause Wyvern to break and emit some unexpected behaviour. In the event that this happens, please open a ticket on our [Discord](https://wyvern.cx/discord) server, and we'll be more than happy to help!
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Please note that old Intel CPUs that are **"Pre Intel 4th-gen or Pre 2013"** have some issues and sadly won't be supported with Wyvern. If you have purchased a key and have an incompatible CPU, contact us on [Discord](https://wyvern.cx/discord) and we will issue you a refund no questions asked.
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### Compatibility

* Supports Intel, AMD CPU/GPUs and Nvidia GPUs
* Supports all Windows 8.1, 10 and 11 versions/builds
* We do NOT offer official support for custom Windows ISOs but you may have luck with custom ISOs such as AtlasOS or ReviOS.