exec zsh不在我的windows中工作powershell帮助我理解

PS C:\Users\HP> git clone --depth=1 https://github.com/romkatv/powerlevel10k.git ${ZSH_CUSTOM:-$HOME/.oh-my-zsh/custom}/themes/powerlevel10k
fatal: destination path '/themes/powerlevel10k' already exists and is not an empty directory.
PS C:\Users\HP> code ~/.zshrc
PS C:\Users\HP> exec zsh
exec : The term 'exec' is not recognized as the name of a cmdlet, function, script file, or operable program. Check
the spelling of the name, or if a path was included, verify that the path is correct and try again.
At line:1 char:1
+ exec zsh
+ ~~~~
    + CategoryInfo          : ObjectNotFound: (exec:String) [], CommandNotFoundException
    + FullyQualifiedErrorId : CommandNotFoundException

我想在myshell中执行zsh