Com o PowerShell, pode ser tão fácil quanto:
$Search='given word'
Get-ChildItem "HKCU:Software/Microsoft/Internet Explorer/MenuExt"|
Where Name -like "*$Search*"|
Remove-Item -Confirm
Cole no console do PowerShell Ou ISE ou salve como um arquivo com extensão .ps1 e execute com um caminho, por exemplo, .\scriptfilename.ps1
Exemplo de saída:
PS> $Search = 'Google'
PS> Get-ChildItem "HKCU:Software/Microsoft/Internet Explorer/MenuExt"|
>> Where Name -like "*$Search*"|
>> Remove-Item -Confirm
Confirm
Are you sure you want to perform this action?
Performing the operation "Remove Key" on target "Item: HKEY_CURRENT_USER\Software\Microsoft\
Internet Explorer\MenuExt\Add to Google Photos Screensa&ver".
[Y] Yes [A] Yes to All [N] No [L] No to All [S] Suspend [?] Help (default is "Y"):