Do Avast Premium Security block PLEX ?

Do Avast Premium Security block PLEX ?

I don´t know. But PLEX run slow and bad.

How can I fix it ?
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Is it safe to turn off Avast. While watching PLEX movies ?
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Of shall I do something else ?
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I do not know how tu turn Avast off.
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And maybe it is a bad idea ?
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But I like PLEX to be better !

Not sure if it’s related to your issue, but see: https://www.bleepingcomputer.com/news/security/plex-media-servers-actively-abused-to-amplify-ddos-attacks/