install Azure PowerShell on Windows10

get steps from https://docs.microsoft.com/en-us/powershell/azure/install-az-ps?view=azps-4.7.0, Installing the module for all users on a system requires elevated privileges. Start the PowerShell session using Run as administrator in Windows or use the sudo command on macOS or Linux:

1. install the Azure PowerShell:
if ($PSVersionTable.PSEdition -eq 'Desktop' -and (Get-Module -Name AzureRM -ListAvailable)) {
    Write-Warning -Message ('Az module not installed. Having both the AzureRM and ' +
      'Az modules installed at the same time is not supported.')
} else {
    Install-Module -Name Az -AllowClobber -Scope AllUsers
}

2. run Connect-AzAccount to login
PS C:\Windows\system32> Connect-AzAccount
Connect-AzAccount : The 'Connect-AzAccount' command was found in the module 'Az.Accounts', but the module could not be
loaded. For more information, run 'Import-Module Az.Accounts'.
At line:1 char:1
+ Connect-AzAccount
+ ~~~~~~~~~~~~~~~~~
    + CategoryInfo          : ObjectNotFound: (Connect-AzAccount:String) [], CommandNotFoundException
    + FullyQualifiedErrorId : CouldNotAutoloadMatchingModule

3. run Set-ExecutionPolicy RemoteSigned to fix the issue
PS C:\Windows\system32> Set-ExecutionPolicy RemoteSigned

4. run Connect-AzAccount to login again:
PS C:\Windows\system32> Connect-AzAccount

Account               SubscriptionName         TenantId                             Environment
-------               ----------------         --------                             -----------
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5. run Get-AzResourceGroup to get your ResourceGroup list
PS C:\Windows\system32> Get-AzResourceGroup -Name '*'