diff --git a/src/batch.sh b/src/batch.sh
index 22725c83..525d1c80 100644
--- a/src/batch.sh
+++ b/src/batch.sh
@@ -55,6 +55,10 @@ Win9xInstall() {
     validateWin95OSR2 "$target" "$desc" || return 1
   fi
 
+  # Resolve the filenames used by patching and staging before either can create
+  # a second case variant that would collide on the FAT system volume.
+  prepareWin9xFileNames "$target" "$desc" "normalize" || return 1
+
   [ -z "$WIDTH" ] && WIDTH="1024"
   [ -z "$HEIGHT" ] && HEIGHT="768"
 
@@ -258,6 +262,70 @@ Win9xInstall() {
   return 0
 }
 
+prepareWin9xFileNames() {
+
+  local dir="$1"
+  local desc="$2"
+  local mode="${3:-check}"
+
+  if ! python3 - "$dir" "$mode" <<'PY'
+from pathlib import Path
+import os
+import re
+import sys
+
+root = Path(sys.argv[1])
+mode = sys.argv[2]
+
+# FAT cannot store two entries whose names differ only in case. Check complete
+# source trees, including OEM files, before copying anything onto the volume.
+for directory, folders, files in os.walk(root):
+    seen = {}
+    for name in sorted(folders + files):
+        key = name.casefold()
+        if key in seen:
+            raise SystemExit(
+                f'Case-insensitive filename collision in {directory}: '
+                f'{seen[key]!r} and {name!r}.'
+            )
+        seen[key] = name
+
+if mode == 'check':
+    raise SystemExit(0)
+if mode != 'normalize':
+    raise SystemExit(f'Unknown Windows 9x filename preparation mode: {mode}')
+
+# Match the exact names written by Patcher9x and the setup-source staging steps.
+# Patcher9x writes WIN.COM/WIN.CNF in lowercase, while its VxD names are uppercase.
+# Cabinet names stay intact because split cabinets can reference those names.
+canonical_names = (
+    'VMM32.VXD', 'VMM.VXD', 'NTKERN.VXD', 'IOS.VXD', 'ESDI_506.PDR',
+    'SCSIPORT.PDR', 'NDIS.VXD', 'NDIS.386', 'VCACHE.VXD', 'win.com', 'win.cnf',
+    'SETUPPP.INF', 'MOUSE.DRV', 'SCANDISK.INI', 'WMP.INF', 'MPLAYER2.INF',
+    'DOCKER.PWL', 'HIDE.EXE', 'WAIT.EXE', 'POST9X.BAT', 'POST9X.NEW',
+    'POST9X.REG', 'WIN9XDMA.EXE', 'W9XSCAN.INI', 'PATCH9X.EXE', 'CWSDPMI.EXE',
+    'PATCH9X.NEW', 'W9XAUTO.BAT', 'Shared.lnk', 'MEIO.SYS', 'MECOM.COM',
+    'MEREGENV.EXE', 'MEBOOT.BAT', 'MEPOWER.EXE', 'MEFINAL.BAT', 'MSBATCH.INF',
+    'VMDISP9X', 'vmdisp9x.inf', 'qemumini.drv', 'qemumini.vxd',
+    'vmwsmini.drv', 'vmwsmini.vxd', 'vmhal9x.dll', 'vmhal486.dll', 'vmdisp9x.dll',
+)
+canonical = {name.casefold(): name for name in canonical_names}
+
+for entry in sorted(root.iterdir()):
+    name = canonical.get(entry.name.casefold(), entry.name)
+    if re.fullmatch(r'layout[0-9]*\.inf', entry.name, re.IGNORECASE):
+        name = entry.name.upper()
+    if name != entry.name:
+        entry.rename(root / name)
+PY
+  then
+    error "Failed to prepare $desc filenames for the system image!"
+    return 1
+  fi
+
+  return 0
+}
+
 validateWin95OSR2() {
 
   local dir="$1"
@@ -3254,7 +3322,15 @@ createWin9xSystemImage() {
 
   for entry in "${entries[@]}"; do
 
-    if ! MTOOLSRC="$config" mcopy -Q -s "$entry" w:/; then
+    # Reject ambiguous case variants before an unattended copy. All intended
+    # replacements already share one source filename, so copy order cannot
+    # select an older unpatched payload over the staged replacement.
+    if ! prepareWin9xFileNames "$entry" "$desc"; then
+      rm -f -- "$tmp"
+      return 1
+    fi
+
+    if ! MTOOLSRC="$config" mcopy -Q -s -o "$entry" w:/; then
       rm -f -- "$tmp"
       error "Failed to copy $desc file: $entry"
       return 1
diff --git a/src/define.sh b/src/define.sh
index 84e162fa..0c9c2e95 100644
--- a/src/define.sh
+++ b/src/define.sh
@@ -1024,6 +1024,8 @@ getLink1() {
 
   [[ "${lang,,}" != "en" && "${lang,,}" != "en-us" ]] && return 0
 
+  return 0 # Disable
+
   case "${id,,}" in
     "win11x64" | "win11x64-enterprise" )
       size=6927149056
diff --git a/src/sif.sh b/src/sif.sh
index 0f14af0f..a8c2ea8b 100644
--- a/src/sif.sh
+++ b/src/sif.sh
@@ -375,7 +375,7 @@ disableGenericDisplay() {
 
   [[ "$driver" == "2k3" && "${arch,,}" == "amd64" ]] || return 0
 
-  local qbochs_inf="$drivers/qbochs/$driver/x64/qbochs.inf"
+  local qbochs_inf="$drivers/qbochs/$driver/$arch/qbochs.inf"
   local qbochs_id='PCI\VEN_1234&DEV_1111&SUBSYS_11001AF4'
 
   # Do not remove the generic VGA match unless the exact QBochs device is