diff --git a/impacket/dcerpc/v5/dcomrt.py b/impacket/dcerpc/v5/dcomrt.py
index 489af67e67..2c751e5cb4 100644
--- a/impacket/dcerpc/v5/dcomrt.py
+++ b/impacket/dcerpc/v5/dcomrt.py
@@ -1086,14 +1086,15 @@ def get_dce_rpc(self):
         return DCOMConnection.PORTMAPS[self.__target]
 
     def disconnect(self):
-        if DCOMConnection.PINGTIMER is not None:
+        # https://github.com/fortra/impacket/issues/1039
+        if self.__target in DCOMConnection.PORTMAPS.keys():
             del(DCOMConnection.PORTMAPS[self.__target])
+        if self.__target in DCOMConnection.OID_SET.keys():
             del(DCOMConnection.OID_SET[self.__target])
-            if len(DCOMConnection.PORTMAPS) == 0:
-                # This means there are no more clients using this object, kill it
-                DCOMConnection.PINGTIMER.cancel()
-                DCOMConnection.PINGTIMER.join()
-                DCOMConnection.PINGTIMER = None
+        if DCOMConnection.PINGTIMER and len(DCOMConnection.PORTMAPS) == 0:
+            DCOMConnection.PINGTIMER.cancel()
+            DCOMConnection.PINGTIMER.join()
+            DCOMConnection.PINGTIMER = None
         if self.__target in INTERFACE.CONNECTIONS:
             del(INTERFACE.CONNECTIONS[self.__target][current_thread().name])
         self.__portmap.disconnect()
diff --git a/impacket/dcerpc/v5/srvs.py b/impacket/dcerpc/v5/srvs.py
index 77dccd2f40..2de8bd745c 100644
--- a/impacket/dcerpc/v5/srvs.py
+++ b/impacket/dcerpc/v5/srvs.py
@@ -3095,9 +3095,12 @@ def hNetrShareDel(dce, netName):
     request['NetName'] = netName
     return dce.request(request)
 
-def hNetrShareEnum(dce, level, resumeHandle = 0, preferedMaximumLength = 0xffffffff):
+def hNetrShareEnum(dce, level, resumeHandle = 0, preferedMaximumLength = 0xffffffff, serverName = '\x00'):
+    # serverName example: "\\\\1.2.3.4\x00"
+    if serverName[-1] != '\x00':
+        serverName += '\x00'  # final NULL byte is mandatory
     request = NetrShareEnum()
-    request['ServerName'] = '\x00'
+    request['ServerName'] = serverName
     request['PreferedMaximumLength'] = preferedMaximumLength
     request['ResumeHandle'] = resumeHandle
     request['InfoStruct']['Level'] = level
diff --git a/impacket/smb3.py b/impacket/smb3.py
index c4c02d29fe..fe13296fea 100644
--- a/impacket/smb3.py
+++ b/impacket/smb3.py
@@ -115,6 +115,54 @@
     'Connection' : 0,
 }
 
+# Source:
+# https://en.wikipedia.org/wiki/List_of_Microsoft_Windows_versions
+# https://www.gaijin.at/en/infos/windows-version-numbers
+WIN_VERSIONS = {
+    102:"Windows 3.1",
+    103:"Windows 3.1",
+    153:"Windows 3.2",
+    300:"Windows 3.11",
+    528:"Windows NT 3.1 SP3",
+    807:"Windows NT 3.5",
+    950:"Windows 95",
+    1057:"Windows NT 3.51",
+    1381:"Windows NT 4.0",
+    1998:"Windows 98",
+    2195:"Windows 2000",
+    2222:"Windows 98 Second Edition",
+    2600:"Windows XP",
+    2700:"Windows XP",
+    2710:"Windows XP",
+    3000:"Windows Me",
+    3790:"Windows XP / Server 2003 / Server 2003 R2",
+    6002:"Windows Vista",
+    6003:"Windows Server 2008",
+    7601:"Windows 7 / Server 2008 R2",
+    8400:"Windows Home Server 2011",
+    9200:"Windows 8 / Server 2012",
+    9600:"Windows 8.1 / Server 2012 R2",
+    10240:"Windows 10",
+    10586:"Windows 10",
+    14393:"Windows 10 / Server 2016",
+    15063:"Windows 10",
+    16299:"Windows 10 / Server 2016",
+    17134:"Windows 10 / Server 2016",
+    17763:"Windows 10 / Server 2019",
+    18362:"Windows 10 / Server 2019",
+    18363:"Windows 10 / Server 2019",
+    19041:"Windows 10 / Server 2019",
+    19042:"Windows 10 / Server 2019",
+    19043:"Windows 10",
+    19044:"Windows 10",
+    19045:"Windows 10",
+    20348:"Windows Server 2022",
+    22000:"Windows 11",
+    22621:"Windows 11",
+    22631:"Windows 11",
+    25398:"Windows Server 2022",
+}
+
 
 class SessionError(Exception):
     def __init__( self, error = 0, packet=0):
@@ -1001,15 +1049,16 @@ def login(self, user, password, domain = '', lmhash = '', nthash = ''):
                     version = ntlmChallenge['Version']
 
                     if len(version) >= 4:
-                        self._Session['ServerOS'] = "Windows %d.%d Build %d" % (indexbytes(version,0), indexbytes(version,1), struct.unpack('<H',version[2:4])[0])
+                        if struct.unpack('<H',version[2:4])[0] in WIN_VERSIONS.keys():
+                            self._Session['ServerOS'] = WIN_VERSIONS[struct.unpack('<H',version[2:4])[0]] + " Build %d" % struct.unpack('<H',version[2:4])[0]
+                        else:
+                            self._Session['ServerOS'] = "Windows %d.%d Build %d" % (indexbytes(version,0), indexbytes(version,1), struct.unpack('<H',version[2:4])[0])
                         self._Session["ServerOSMajor"] = indexbytes(version,0)
                         self._Session["ServerOSMinor"] = indexbytes(version,1)
                         self._Session["ServerOSBuild"] = struct.unpack('<H',version[2:4])[0]
 
             type3, exportedSessionKey = ntlm.getNTLMSSPType3(auth, respToken['ResponseToken'], user, password, domain, lmhash, nthash)
 
-
-
             respToken2 = SPNEGO_NegTokenResp()
             respToken2['ResponseToken'] = type3.getData()
 
diff --git a/impacket/smbconnection.py b/impacket/smbconnection.py
index bcc8031f89..4d27643b7a 100644
--- a/impacket/smbconnection.py
+++ b/impacket/smbconnection.py
@@ -381,7 +381,7 @@ def listShares(self):
         dce = rpctransport.get_dce_rpc()
         dce.connect()
         dce.bind(srvs.MSRPC_UUID_SRVS)
-        resp = srvs.hNetrShareEnum(dce, 1)
+        resp = srvs.hNetrShareEnum(dce, 1, serverName="\\\\" + self.getRemoteHost())
         return resp['InfoStruct']['ShareInfo']['Level1']['Buffer']
 
     def listPath(self, shareName, path, password = None):