Lately I have installed Garuda Linux and as I click Windows key it wouldn't launch applications menu. How to fix this issue. Thanks in advance
It’s called *learning your Operating System settings." Explore, experiment, be bold. I promise it won’t eat your firstborn.
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Welcome to Garuda! Have you done the minimum study on how to ask for support?
Reporting bugs | Garuda Linux wiki
What you ask may have different answer, depending on your installed system and OS/ISO version.
Help us help you. 
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First, stop calling it $PROPRIETARY_OS_THAT_SHALL_NOT_BE_NAMED key, it's called the Meta key.
Second, which desktop environment are you using?
Third, welcome to the forum! 
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