diff --git a/playbook/shopfloor-setup/run-enrollment.ps1 b/playbook/shopfloor-setup/run-enrollment.ps1
index b1495f8..de4c1d8 100755
--- a/playbook/shopfloor-setup/run-enrollment.ps1
+++ b/playbook/shopfloor-setup/run-enrollment.ps1
@@ -27,11 +27,22 @@ if (-not $ppkgFile) {
 }
 Log "Package: $($ppkgFile.Name)"
 
-# --- Set computer name to E<serial> ---
-$serial = (Get-CimInstance Win32_BIOS).SerialNumber
-$newName = "E$serial"
-Log "Setting computer name to $newName"
-Rename-Computer -NewName $newName -Force -ErrorAction SilentlyContinue
+# --- Computer name: the PPKG owns it, do NOT rename here ---
+# The package declares <DNSComputerName>F%SERIAL%</DNSComputerName>, so a bay is
+# meant to come up as F<serial>. This script used to run
+#   Rename-Computer -NewName "E$serial"
+# which is a second pending rename racing the package's. Observed on 579C144
+# 2026-08-06:
+#
+#   13:31:55  run-enrollment  Rename-Computer -> E579C144      (pending)
+#   13:32:17  ppkg            Reboot/DeviceName -> F%SERIAL%   (pending)
+#             "Reboot successfully scheduled. Device name set successfully."
+#   13:36:45  run-enrollment runs AGAIN -> E579C144            (overwrites F)
+#   ~13:37    reboot, E579C144 wins
+#
+# Last writer wins at reboot, so the hardcoded E prefix silently beat the
+# package's F. Nothing in this repo ever produced an F name; the convention only
+# works if we leave naming to the package.
 
 # --- Install provisioning package ---
 # IMPORTANT: The PPKG must be installed BEFORE OOBEComplete is set. Bulk