organization and logic updates

Start-Windows10UpdateAssistant.ps1

@@ -1,54 +1,50 @@
 ## Make sure the computer is running Windows 10
-If ( ([System.Environment]::OSVersion.Version).Major -ge 10 ) {
+If ( IsWindowsVersion -ge "10.0" ) {
 
     ## Make sure the endpoint isn't already running 2004
-    If ( ([System.Environment]::OSVersion.Version).Build -lt 19041 ) {
+    If ( IsWindowsBuild -lt 19041 ) {
         
         ## Set the directory where the Windows Update Assistant will be downloaded to
-        $DOWNLOADS = "${Env:TEMP}"
+        $DOWNLOADS = $Env:TEMP
 
         ## URL to the 2004 version of the Windows Update Assistant
-        ## If $URL is already defined when the script is run, just use that value
+        $URL = 'https://download.microsoft.com/download/8/3/c/83c39dca-2d27-4c24-b98b-0a4d6d921c80/Windows10Upgrade9252.exe'
-        If ( !($URL) ) { $URL = 'https://download.microsoft.com/download/8/3/c/83c39dca-2d27-4c24-b98b-0a4d6d921c80/Windows10Upgrade9252.exe' }
 
         ## Uninstall previous Windows 10 Update Assistant
         If ( Test-Path "${Env:SystemDrive}\Windows10Upgrade\Windows10UpgraderApp.exe" )
         {
             Write-Output "Uninstalling existing Windows 10 Update Assistant"
-            Start-Process "${Env:SystemDrive}\Windows10Upgrade\Windows10UpgraderApp.exe" -ArgumentList '/ForceUninstall' -Wait
+            Try { Start-Process "${Env:SystemDrive}\Windows10Upgrade\Windows10UpgraderApp.exe" -ArgumentList '/ForceUninstall' -Wait }
+            Catch { Write-Output $_.Exception.Message }
         }
 
-        ## Create download directory if not using $Env:TEMP
-        #If (!( Test-Path $DOWNLOADS ))
-        #{
-        #    Write-Output "Creating "${DOWNLOADS}"
-        #    New-Item -ItemType Directory -Path $DOWNLOADS
-        #}
-
         ## Download Windows 10 Update Assistant
         $FILENAME = Split-Path $URL -leaf
         If ( Test-Path "${DOWNLOADS}\${FILENAME}" )
         {
             Write-Output "Deleting existing installer: ${DOWNLOADS}\${FILENAME}"
-            Remove-Item "${DOWNLOADS}\${FILENAME}" -Force -ErrorAction SilentlyContinue
+            Try { Remove-Item "${DOWNLOADS}\${FILENAME}" -Force -ErrorAction SilentlyContinue }
+            Catch { Write-Output $_.Exception.Message }
         }
         Write-Output "Downloading ${URL} to ${DOWNLOADS}\${FILENAME}"
-        (New-Object System.Net.WebClient).DownloadFile($URL,"${DOWNLOADS}\${FILENAME}")
+        Try { (New-Object System.Net.WebClient).DownloadFile($URL,"${DOWNLOADS}\${FILENAME}") }
+        Catch { Write-Output $_.Exception.Message }
 
         ## Install and run the Windows 10 Update Assistant
         If ( Test-Path "${DOWNLOADS}\${FILENAME}" )
         {
             Write-Output "Launching installer: ${DOWNLOADS}\${FILENAME}"
-            Start-Process -FilePath "${DOWNLOADS}\${FILENAME}" -Wait
+            Try { Start-Process -FilePath "${DOWNLOADS}\${FILENAME}" -Wait }
-        }
+            Catch { Write-Output $_.Exception.Message }
 
-        ## Delete the downloaded program
-        If ( Test-Path "${DOWNLOADS}\${FILENAME}" )
-        {
             Write-Output "Deleting installer: ${DOWNLOADS}\${FILENAME}"
-            Remove-Item "${DOWNLOADS}\${FILENAME}"
+            Try { Remove-Item "${DOWNLOADS}\${FILENAME}" }
+            Catch { Write-Output $_.Exception.Message }
         }
+        Else { Write-Output "${DOWNLOADS}\${FILENAME} does not exist" }
 
-    } Else { Write-Output "This endpoint is already up to date." }
+    }
+    Else { Write-Output "This endpoint is already up to date." }
 
-} Else { Write-Output "This endpoint is not running Windows 10." }
+}
+Else { Write-Output "This endpoint is not running Windows 10." }

Tools.ps1

@@ -58,6 +58,7 @@ Return [version]$Return.Trim('.')
 }
 
 ## Function to compare current Windows version with a supplied version
+## The value supplied must be a string and must include at least 1 decimal
 Function IsWindowsVersion
 {
 param(
@@ -78,15 +79,16 @@ switch ($PSCmdlet.ParameterSetName)
 }
 }
 
-## Function to compare current Windows version with a supplied version
+## Function to compare current Windows build with a supplied version
+## The value supplied must be an int
 Function IsWindowsBuild
 {
 param(
-    [Parameter(Mandatory=$true,ParameterSetName='gt')][string]$gt,
+    [Parameter(Mandatory=$true,ParameterSetName='gt')][int]$gt,
-    [Parameter(Mandatory=$true,ParameterSetName='ge')][string]$ge,
+    [Parameter(Mandatory=$true,ParameterSetName='ge')][int]$ge,
-    [Parameter(Mandatory=$true,ParameterSetName='lt')][string]$lt,
+    [Parameter(Mandatory=$true,ParameterSetName='lt')][int]$lt,
-    [Parameter(Mandatory=$true,ParameterSetName='le')][string]$le,
+    [Parameter(Mandatory=$true,ParameterSetName='le')][int]$le,
-    [Parameter(Mandatory=$true,ParameterSetName='eq')][string]$eq
+    [Parameter(Mandatory=$true,ParameterSetName='eq')][int]$eq
 )
 [int]$WindowsBuild = [System.Environment]::OSVersion.Version.Build
 switch ($PSCmdlet.ParameterSetName)