Remote PowerShell credentials error

Trying to use this to do a network scan and find out if a current virus file we've been suffering from is on the relevant computers. But I get an error messages as follows:

Error: New-Object : Cannot find type [PSCredential]: make sure the assembly containing this type is loaded., At line:1 char:83, + Invoke-Command -ComputerName 10.123.90.28 -HideComputerName -Credential (New-Object <<<<  PSCredential -ArgumentList 'xxxxxxxx\xxxxx', (ConvertTo-SecureString -AsPlainText '**********' -Force)) -ScriptBlock { Test-Path 'C:\User, s\*\AppData\Local\Temp\*.tmp.exe' }, + CategoryInfo: InvalidType: (:) [New-Object], PSArgumentException + FullyQualifiedErrorId : TypeNotFound, Microsoft.PowerShell.Commands.NewObjectCommand

I can connect to a computer in PowerShell ISE okay using the credentials and even run the command I'm trying to run okay...

PS S:\> Enter-PSSession 'MR-WELLINGTON' -Credential:'xxxxxxxx\xxxxx'
[mr-wellington]: PS Test-Path 'C:\Users\*\AppData\Local\Temp\*.tmp.exe'
False

Any ideas?

It looks like in some cases PowerShell wants a fully qualified path to PSCredential, i.e. System.Management.Automation.PSCredential.

Try this build and let me know if it works.

Yes, that does the trick. Brilliant - thanks for the quick response.