question

Check your $env:PSModulePath and verify that it contains C:\WINDOWS\system32\WindowsPowerShell\v1.0\Modules

Verify that this file exists: C:\WINDOWS\system32\WindowsPowerShell\v1.0\Modules\WindowsUpdateProvider\WindowsUpdateProvider.psd1

 (get-module -ListAvailable windowsupdateprov*).path
 (get-module -ListAvailable windowsupdateprov*).ExportedCommands

PS C:\WINDOWS\system32> (get-module -ListAvailable windowsupdateprov*).path
C:\WINDOWS\system32\WindowsPowerShell\v1.0\Modules\WindowsUpdateProvider\WindowsUpdateProvider.psd1
PS C:\WINDOWS\system32> (get-module -ListAvailable windowsupdateprov*).ExportedCommands

Key Value

---

Get-WUAVersion Get-WUAVersion
Get-WULastInstallationDate Get-WULastInstallationDate
Get-WULastScanSuccessDate Get-WULastScanSuccessDate
Get-WUIsPendingReboot Get-WUIsPendingReboot
Install-WUUpdates Install-WUUpdates
Start-WUScan Start-WUScan

The module is removed in version 2004 (20H1), and thus 20H2 too
https://github.com/MicrosoftDocs/windows-powershell-docs/issues/139#issuecomment-648125918

you either have to rely on the manual commands to run the scan
e.g.

 $Session = new-object -com "Microsoft.Update.Session"
 $ctr = "(IsInstalled=0 and DeploymentAction=*) or (IsInstalled=1 and DeploymentAction=*) or (IsHidden=1 and DeploymentAction=*)"
 $Result = $Session.CreateupdateSearcher().Search($ctr).Updates
 $Result | Select Title,Identity,IsHidden,LastDeploymentChangeTime,KBArticleIDs | Format-List -Property Title,@{l='UpdateID';e={$_.Identity.UpdateID}},@{l='PublishedDate';e={$_.LastDeploymentChangeTime.ToString('yyyy-MM-dd')}},@{l='KBArticle';e={$_.KBArticleIDs}},IsHidden

or install external module PSWindowsUpdate

 Install-PackageProvider -Name NuGet -Force
 Set-PSRepository -Name PSGallery -InstallationPolicy Trusted
 Install-Module -Name PSWindowsUpdate

Hi，

Check if the module WindowsUpdateProvider and the file C:\Windows\System32\WindowsPowerShell\v1.0\Modules\WindowsUpdateProvider\WindowsUpdateProvider.psd1 exist. If yes, please help to post the contents of the psd1 file.

Best Regards，
Ian Xue
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Please bring back the "WindowsUpdateProvider" module