Currently I'm trying to run this powershell script:

Param (
    $websiteName,
    $physicalPath
)

import-module WebAdministration
$website = get-website | where-object { $_.name -eq "$websiteName" }
if($website -eq $null){
    New-webapppool -Name "$websiteName"
    Set-WebConfiguration -filter "/system.applicationHost/applicationPools/add[@name='$websiteName']" -PSPath IIS:\ -value (@{managedRuntimeVersion="v4.0"})
    New-website -Name "$websiteName" -PhysicalPath "$physicalPath" -ApplicationPool "$websiteName"
    start-website "$websiteName"
}

I use the following command to run the script: 

& .\InstallWebsite.ps1 -websiteName "MyWebsite" -physicalPath "C:\TEST\MyWebsite"

Everything works fine, except for the last command inside of the if statement:

start-website "$websiteName"

When that command runs, I receive the following error, which I haven't been able to successfully troubleshoot:

Start-Website : Cannot create a file when that file already exists. (Exception from HRESULT: 0x800700B7)
At line:1 char:14
+ start-website <<<<  "MyWebsite"
    + CategoryInfo          : InvalidOperation: (:) [Start-Website], COMException
    + FullyQualifiedErrorId : InvalidOperation,Microsoft.IIs.PowerShell.Provider.StartWebsiteCommand

I also have the following script to remove the website if it matters:

Param (
    $websiteName,
    $appPoolName
)

import-module WebAdministration
$website = get-website | where-object { $_.name -eq "$websiteName" }
if($website -ne $null){
    remove-website -Name "$websiteName"
    remove-webapppool -Name "$websiteName"
}

I run it with the following command:

& .\UninstallWebsite.ps1 -websiteName "MyWebsite" -appPoolname "MyWebsite"
powershell iis-7
Edit
Report