diff --git a/bin/omarchy-system-factory-reset b/bin/omarchy-system-factory-reset
index 51eca401..217ad00a 100755
--- a/bin/omarchy-system-factory-reset
+++ b/bin/omarchy-system-factory-reset
@@ -330,6 +330,14 @@ stage_full_reset() {
   [[ -f $unit_src/omarchy-provision-owner.service && -x $next/usr/bin/omarchy-provision-owner ]] ||
     fail "the factory snapshot predates provisioning support; cannot reset from it"
 
+  # A normal install's factory snapshot includes the original owner's USB
+  # policy and enabled daemon. Keep input usable during the new owner's setup;
+  # provisioning enrolls their devices before enabling USBGuard again.
+  if [[ -f $next/usr/lib/systemd/system/usbguard.service ]]; then
+    systemctl --root="$next" disable usbguard.service >>"$LOG_FILE" 2>&1 ||
+      fail "could not disable USBGuard in the factory system (see $LOG_FILE)"
+  fi
+
   log "Scrubbing machine identity from the factory system"
   systemd-id128 new >"$next/etc/machine-id"
   rm -f "$next"/etc/ssh/ssh_host_*
diff --git a/test/shell.d/usb-factory-reset-test.sh b/test/shell.d/usb-factory-reset-test.sh
new file mode 100755
index 00000000..e3d71404
--- /dev/null
+++ b/test/shell.d/usb-factory-reset-test.sh
@@ -0,0 +1,104 @@
+#!/bin/bash
+
+set -euo pipefail
+source "$(dirname "$0")/base-test.sh"
+
+# Exercise reset staging in a temporary root with the real offline systemctl.
+# Never invoke the reset command's main function or any actual disk operations.
+python - "$ROOT" <<'PY'
+from pathlib import Path
+import os
+import re
+import shutil
+import subprocess
+import sys
+import tempfile
+
+repo = Path(sys.argv[1])
+source = (repo / 'bin/omarchy-system-factory-reset').read_text()
+functions = []
+for name in ['install_provisioning_units', 'sanitize_factory_baseline', 'stage_full_reset']:
+  match = re.search(r'^' + name + r'\(\) \{\n.*?^\}', source, re.M | re.S)
+  assert match, name
+  functions.append(match.group())
+
+with tempfile.TemporaryDirectory(prefix='omarchy-usb-reset-') as tmp:
+  scratch = Path(tmp)
+  for scenario in ['enabled', 'disabled', 'absent', 'disable-failure']:
+    root = scratch / scenario
+    top = root / 'top'
+    factory = top / '@factory'
+    for rel in ['etc/systemd/system/basic.target.wants', 'usr/lib/systemd/system',
+          'etc/usbguard', 'usr/bin', 'usr/share/omarchy/install/provisioning']:
+      (factory / rel).mkdir(parents=True, exist_ok=True)
+    (top / '@').mkdir()
+    (top / '@' / 'original-root').touch()
+    (factory / 'etc/passwd').write_text('root:x:0:0:root:/root:/bin/bash\n')
+    (factory / 'etc/machine-id').write_text('old-machine-id\n')
+    policy = 'allow id 1234:0001 name "Original owner keyboard" hash "old-owner"\n'
+    (factory / 'etc/usbguard/rules.conf').write_text(policy)
+    unit = factory / 'usr/lib/systemd/system/usbguard.service'
+    enabled_path = Path('etc/systemd/system/basic.target.wants/usbguard.service')
+    if scenario != 'absent':
+      unit.write_text('[Unit]\nDescription=Fixture USBGuard\n[Service]\nExecStart=/bin/true\n[Install]\nWantedBy=basic.target\n')
+    if scenario in ['enabled', 'disable-failure']:
+      (factory / enabled_path).symlink_to('/usr/lib/systemd/system/usbguard.service')
+    owner = factory / 'usr/bin/omarchy-provision-owner'
+    owner.touch()
+    owner.chmod(0o755)
+    for name in ['omarchy-provision-owner.service', 'omarchy-system-factory-reset-finish.service']:
+      shutil.copyfile(repo / 'install/provisioning' / name,
+              factory / 'usr/share/omarchy/install/provisioning' / name)
+    harness = '''#!/bin/bash
+set -euo pipefail
+TOP_MNT="$1/top"
+NEXT_NAME=@next
+PROVISIONING_DIR=/var/lib/omarchy/provisioning
+LOG_FILE="$1/log"
+log() { :; }
+fail() { echo "$*" >&2; exit 1; }
+btrfs() {
+  if [[ $1 == subvolume && $2 == snapshot ]]; then
+    cp -a "$3" "$4"
+  elif [[ $1 == property ]]; then
+    :
+  else
+    return 90
+  fi
+}
+passwd() { :; }
+systemd-id128() { echo new-machine-id; }
+encrypted_install() { return 1; }
+rebuild_next_boot() { :; }
+sync() { :; }
+systemctl() {
+  # All service changes must address the staged root, never the live machine.
+  [[ $1 == "--root=$TOP_MNT/$NEXT_NAME" && $2 == disable && $3 == usbguard.service ]] || return 91
+  [[ $2 != "${FAIL_OPERATION:-}" ]] || return 92
+  command systemctl "$@"
+}
+''' + '\n\n'.join(functions) + '\nstage_full_reset\n'
+    runner = root / 'run'
+    runner.write_text(harness)
+    env = os.environ.copy()
+    env['FAIL_OPERATION'] = 'disable' if scenario == 'disable-failure' else ''
+    result = subprocess.run(['bash', str(runner), str(root)], env=env, capture_output=True, text=True)
+    if scenario == 'disable-failure':
+      assert result.returncode != 0, 'failed disable must abort reset staging'
+      assert (top / '@' / 'original-root').exists(), 'failure must not activate the reset root'
+      assert 'could not disable USBGuard' in result.stderr
+    else:
+      assert result.returncode == 0, result.stderr
+      staged = top / '@'
+      assert not (staged / enabled_path).is_symlink(), 'reset must not start USBGuard before enrollment'
+      assert (staged / 'var/lib/omarchy/provisioning/pending').exists()
+      assert (staged / 'etc/usbguard/rules.conf').read_text() == policy
+      if scenario == 'enabled':
+        assert (factory / enabled_path).is_symlink(), 'only the staged clone is disabled'
+        # The owner-enrollment helper enables the daemon after policy and
+        # ACL setup. Confirm an ordinary enable can reverse this disable.
+        subprocess.run(['systemctl', '--root=' + str(staged), 'enable', 'usbguard.service'],
+               check=True, capture_output=True, text=True)
+        assert (staged / enabled_path).is_symlink()
+    print('ok - factory USB enrollment staging: ' + scenario)
+PY