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AKP5
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can't play mp4 and m4a files

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HP Laptop Model :- 15-da0xxx
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 Mp4 and m4a files were playing normally on windows 10 Home Single Language 64-bit(10.0, Build 19041). I updated the Operating System to windows 11 Home Single Language Version :- 21H2 (OS build:-22000.168, OS Version:-10.0.22000) on 02nd August, 2021. After that, when I trying to play mp4 or m4a files some times a message shows " The specified procedure could not be found. ".

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WAWood
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Message 2 of 2
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@AKP5 

You should NOT have done that update!  Why? Because Win11 is still in Beta testing, will not be released until October 5th at the earliest -- and because we do not provide support here for OSs that are still under test.

 

Also, HP does not currently provide Win11 drivers -- so basically you hosed up your laptop forcing this update.

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***Please mark Accept As Solution if my post solved your problem***

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