Powershell [system.reflection.assembly].loadfile() Exception Access is denied when run by Jenkins - powershell

Question

I have a very simple Powershell script which I want to use as part of a Jenkins build to return Assembly information. The script contains the following:
Write-Host([system.reflection.assembly]::loadfile($args[0])).FullName
When I try and call this script as part of the Jenkins build I get the following errors:
.\GetAssemblyInfo.ps1
Exception calling "LoadFile" with "1" argument(s): "Access is denied.
(Exception from HRESULT: 0x80070005 (E_ACCESSDENIED))"
At C:\Jenkins\workspace\Tools\NuGetBuildSupport\GetAssemblyInfo.ps1:1 char:50
+ Write-Host([system.reflection.assembly]::loadfile <<<< ($args[0])).FullName
+ CategoryInfo : NotSpecified: (:) [], MethodInvocationException
+ FullyQualifiedErrorId : DotNetMethodException
The command runs fine when it is not executing as part of the Jenkins build.
The DLL that is being passed to loadfile is not marked as Blocked
The execution policy I am using to invoke Powershell is Bypass

Answer 1

I recommend navigating to your servers "Services" select the Jenkins service and you can assign a specific user. As a test try giving Jenkins administrator access and if that works create another user and restrict access. The fact that it runs fine outside of the Jenkins infrastructure is an indicator for this issue.
Services: (Search for services in the start menu or the common location: C:\ProgramData\Microsoft\Windows\Start Menu\Programs\Administrative Tools)
Navigate to the Jenkins Service
Open the properties
Select the Log in tab and set it to a user with proper permissions (E.g: administrator)