diff --git a/projects/msp-tools/guru-scan/GuruScan.psm1 b/projects/msp-tools/guru-scan/GuruScan.psm1
index 88accc5..cfffcd2 100644
--- a/projects/msp-tools/guru-scan/GuruScan.psm1
+++ b/projects/msp-tools/guru-scan/GuruScan.psm1
@@ -531,9 +531,16 @@ function Invoke-ScanPass {
 
         try {
             $startParams = @{
-                FilePath    = $launchExe
-                PassThru    = $true
-                NoNewWindow = [bool]$Headless
+                FilePath = $launchExe
+                PassThru = $true
+            }
+            # Use WindowStyle=Hidden (not NoNewWindow) so scanner processes get
+            # their own window/console and do NOT inherit the PowerShell pipe
+            # handles. With NoNewWindow the child shares the parent console and
+            # inherits its stdout/stderr pipes; if a scanner hangs the pipe stays
+            # open after PowerShell exits, blocking the GuruRMM agent for hours.
+            if ($Headless) {
+                $startParams['WindowStyle'] = 'Hidden'
             }
             if ($expandedArgs -and $expandedArgs.Count -gt 0) {
                 $startParams['ArgumentList'] = $expandedArgs