diff --git a/app/services/qualys_service.py b/app/services/qualys_service.py
index 662e064..5baf7dc 100644
--- a/app/services/qualys_service.py
+++ b/app/services/qualys_service.py
@@ -1142,6 +1142,7 @@ def fetch_all_qualys_assets(db, with_progress=False):
             aid = (parse_xml(block, "id") or [""])[0]
             name = (parse_xml(block, "name") or [""])[0]
             addr = (parse_xml(block, "address") or [""])[0]
+            os_str = (parse_xml(block, "os") or [""])[0]
             last_check = ""
             if "<lastCheckedIn>" in block:
                 last_check = (parse_xml(block, "lastCheckedIn") or [""])[0]
@@ -1149,7 +1150,7 @@ def fetch_all_qualys_assets(db, with_progress=False):
             if "<agentInfo>" in block:
                 agent_status = (parse_xml(block, "status") or [""])[0]
             if aid and aid.isdigit():
-                batch.append({"id": int(aid), "name": name, "ip": addr,
+                batch.append({"id": int(aid), "name": name, "ip": addr, "os": os_str,
                               "last_check": last_check, "agent_status": agent_status})
         if not batch:
             break
@@ -1170,6 +1171,16 @@ def find_duplicate_hostnames(db, force_refresh=False):
 
     from collections import defaultdict
     assets = fetch_all_qualys_assets(db)
+    # Filtrer les workstations (Windows 10/11/7/8/XP, MacOS Desktop) - on veut serveurs uniquement
+    WKS_PATTERNS = ("Windows 10", "Windows 11", "Windows 7", "Windows 8", "Windows XP",
+                    "Windows Vista", "macOS")
+    def is_workstation(os_str):
+        if not os_str:
+            return False
+        # Server est explicite, sinon les patterns workstation
+        if "Server" in os_str:
+            return False
+        return any(p in os_str for p in WKS_PATTERNS)
     groups = defaultdict(list)
     for a in assets:
         shortname = a["name"].split(".")[0].lower() if a["name"] else ""
@@ -1178,6 +1189,9 @@ def find_duplicate_hostnames(db, force_refresh=False):
         # Filtrer les hostnames qui sont des IP (ex: "192", "10")
         if shortname.replace(".", "").isdigit():
             continue
+        # Filtrer les workstations
+        if is_workstation(a.get("os", "")):
+            continue
         groups[shortname].append(a)
 
     dupes = []