PS C:\Windows\System32\WindowsPowerShell\v1.0> $upd = new-object -com Microsoft.Update.Session "MyServerName"

$searcher = $upd.CreateUpdateSearcher()

$searcher

New-Object : A positional parameter cannot be found that accepts argument 'MyServerName'.

At line:1 char:8

+ $upd = new-object -com Microsoft.Update.Session "MyServerName"

+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

+ CategoryInfo : InvalidArgument: (:) [New-Object], ParameterBindingException

+ FullyQualifiedErrorId : PositionalParameterNotFound,Microsoft.PowerShell.Commands.NewObjectCommand

You cannot call a method on a null-valued expression.

At line:2 char:1

+ $searcher = $upd.CreateUpdateSearcher()

+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

+ CategoryInfo : InvalidOperation: (:) [], RuntimeException

+ FullyQualifiedErrorId : InvokeMethodOnNull