ответ предложенный в стаковерфлоу
https://stackoverflow.com/questions/...-in-windows-10
работает на 10
Код:
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' origin: https://stackoverflow.com/questions/31720595/pin-program-to-taskbar-using-ps-in-windows-10
If WScript.Arguments.Count < 1 Then WScript.Quit
'----------------------------------------------------------------------
Set objFSO = CreateObject("Scripting.FileSystemObject")
objFile = WScript.Arguments.Item(0)
sKey1 = "HKCU\Software\Classes\*\shell\{:}\\"
sKey2 = Replace(sKey1, "\\", "\ExplorerCommandHandler")
'----------------------------------------------------------------------
With WScript.CreateObject("WScript.Shell")
KeyValue = .RegRead("HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer" & _
"\CommandStore\shell\Windows.taskbarpin\ExplorerCommandHandler")
.RegWrite sKey2, KeyValue, "REG_SZ"
With WScript.CreateObject("Shell.Application")
With .Namespace(objFSO.GetParentFolderName(objFile))
With .ParseName(objFSO.GetFileName(objFile))
.InvokeVerb("{:}")
End With
End With
End With
.Run("Reg.exe delete """ & Replace(sKey1, "\\", "") & """ /F"), 0, True
End With
'----------------------------------------------------------------------
Код:

cscript.exe taskbar_attach.vbs "c:\ProgramData\Microsoft\Windows\Start Menu\Programs\XnView\XnView.lnk"