unarc.dll error

I am trying to install a game but when it reaches about 67% i get the unarc.dll missing file error or whatever. Error 11 I believe

tried a few things I have read to fix it, no luck. Have fire-wall and windows defender off, on windows 10.

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Clarification Request
What game? How can I try this?

This is usually where I find the game's support site but without the game name I'm going with "Please tell more."

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Forza Horizon 3

Forza Horizon 3

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