Index: /trunk/src/VBox/Additions/common/VBoxService/VBoxServiceVMInfo-win.cpp
===================================================================
--- /trunk/src/VBox/Additions/common/VBoxService/VBoxServiceVMInfo-win.cpp	(revision 33890)
+++ /trunk/src/VBox/Additions/common/VBoxService/VBoxServiceVMInfo-win.cpp	(revision 33891)
@@ -393,6 +393,14 @@
                               &enmOwnerType))
         {
-            VBoxServiceError("VMInfo/Users: Failed looking up account info for user '%ls': %ld!\n",
-                             a_pUserInfo->wszUser, GetLastError());
+            DWOR dwErr = GetLastError();
+            /*
+             * If a network time-out prevents the function from finding the name or
+             * if a SID that does not have a corresponding account name (such as a
+             * logon SID that identifies a logon session), we get ERROR_NONE_MAPPED
+             * here that we just skip.
+             */
+            if (dwErr != ERROR_NONE_MAPPED)
+                VBoxServiceError("VMInfo/Users: Failed looking up account info for user '%ls': %ld!\n",
+                                 a_pUserInfo->wszUser, dwErr);
         }
         else