foreach ($module in @("PSWindowsUpdate")){
    if (-not (Get-Module -ListAvailable -Name $module)) {
        Install-Module $module -Scope CurrentUser
    }
    if (-not (Get-Module $module)) {
        Import-Module  $module
    }
}

Get-WindowsUpdate
# Get-WindowsUpdate -KBArticleID "KB4592449" -Install

# Install-WindowsUpdate