reinstall if errors are found in status log

Install-ESETManagementAgent.ps1

@@ -1,9 +1,15 @@
 # NOTE: The $CONFIG variable must be set by the calling script
 
-# Exit this script if agent is already installed
+# Check whether agent is already installed
 If ( Test-Path "${Env:ProgramFiles}\ESET\RemoteAdministrator\Agent\ERAAgent.exe" ) {
-    Microsoft.Powershell.Utility\Write-Output "ESET agent is already installed. This script will now exit."
+    
-    Return
+    # End the script if no errors are found in the status log
+    If ( !(Select-String -Path "${Env:ProgramData}\ESET\RemoteAdministrator\Agent\EraAgentApplicationData\Logs\status.html" -CaseSensitive -Pattern 'Error:' -Quiet) ) {
+        Microsoft.Powershell.Utility\Write-Output "ESET agent is already installed and no errors were found. This script will now exit."
+        Return
+    }
+    
+    Write-Output "ESET agent is already installed, but errors were found in the status log. This script will continue and attempt to reinstall the agent."
 }
 
 # Set path to temp directory
@@ -19,11 +25,11 @@ If ( Test-Path $TEMPDIR ) {
 # Create $TEMPDIR
 Write-Output "Creating: ${TEMPDIR}"
 Try { New-Item -Path $TEMPDIR -ItemType Directory -Force -ErrorAction Stop }
-Catch { Write-Error $_.Exception.Message ; Exit }
+Catch { Write-Error $_.Exception.Message ; Return }
 
 # Write $CONFIG to install_config.ini
 Try { $CONFIG | WriteToFile_UTF8NoBOM -FilePath "${TEMPDIR}\install_config.ini" }
-Catch { Write-Output "Cannot write configuration file! This script will exit." ; Write-Error $_.Exception.Message ; Exit }
+Catch { Write-Output "Cannot write configuration file! This script will exit." ; Write-Error $_.Exception.Message ; Return }
 
 # Get bitness of endpoint and set $AGENTNAME
 If ( Is64bit ) { $AGENTNAME = "agent_x64.msi" } Else { $AGENTNAME = "agent_x86.msi" }