diff --git a/indra/cmake/Copy3rdPartyLibs.cmake b/indra/cmake/Copy3rdPartyLibs.cmake
index 84947adaae5fa67fe202ed47b7ce85c119c68f46..79fbc90fbc251603e611e3c38aa10fe9dc041a00 100755
--- a/indra/cmake/Copy3rdPartyLibs.cmake
+++ b/indra/cmake/Copy3rdPartyLibs.cmake
@@ -22,10 +22,8 @@ if(WINDOWS)
         SLVoice.exe
         ca-bundle.crt
         libsndfile-1.dll
-        vivoxplatform.dll
         vivoxsdk.dll
         ortp.dll
-        zlib1.dll
         vivoxoal.dll
         )
 
diff --git a/indra/newview/CMakeLists.txt b/indra/newview/CMakeLists.txt
index 13040ea423b336904915ceac659d809d85b0dc0d..0e3b802fc7dc1b96a117224cb0c23635be25a442 100755
--- a/indra/newview/CMakeLists.txt
+++ b/indra/newview/CMakeLists.txt
@@ -1735,8 +1735,6 @@ if (WINDOWS)
       ${SHARED_LIB_STAGING_DIR}/${CMAKE_CFG_INTDIR}/vivoxsdk.dll
       ${SHARED_LIB_STAGING_DIR}/${CMAKE_CFG_INTDIR}/ortp.dll
       ${SHARED_LIB_STAGING_DIR}/${CMAKE_CFG_INTDIR}/libsndfile-1.dll
-      ${SHARED_LIB_STAGING_DIR}/${CMAKE_CFG_INTDIR}/zlib1.dll
-      ${SHARED_LIB_STAGING_DIR}/${CMAKE_CFG_INTDIR}/vivoxplatform.dll
       ${SHARED_LIB_STAGING_DIR}/${CMAKE_CFG_INTDIR}/vivoxoal.dll
       ${SHARED_LIB_STAGING_DIR}/${CMAKE_CFG_INTDIR}/ca-bundle.crt
       ${GOOGLE_PERF_TOOLS_SOURCE}
diff --git a/indra/newview/llvoicevivox.cpp b/indra/newview/llvoicevivox.cpp
index fc96b9e21d17e0b5cb175ae9a26ef2bbcbed7460..da8f51bc037a716e5f35ba9f94f1cb46a47af3b7 100755
--- a/indra/newview/llvoicevivox.cpp
+++ b/indra/newview/llvoicevivox.cpp
@@ -3067,7 +3067,8 @@ void LLVivoxVoiceClient::sessionRemovedEvent(
 	}
 	else
 	{
-		LL_WARNS("Voice") << "unknown session " << sessionHandle << " removed" << LL_ENDL;
+		// Already reaped this session.
+		LL_DEBUGS("Voice") << "unknown session " << sessionHandle << " removed" << LL_ENDL;
 	}
 }
 
@@ -3310,7 +3311,8 @@ void LLVivoxVoiceClient::mediaStreamUpdatedEvent(
 	}
 	else
 	{
-		LL_WARNS("Voice") << "session " << sessionHandle << "not found"<< LL_ENDL;
+		// session disconnectintg and disconnected events arriving after we have already left the session.
+		LL_DEBUGS("Voice") << "session " << sessionHandle << " not found"<< LL_ENDL;
 	}
 }
 
@@ -3384,6 +3386,7 @@ void LLVivoxVoiceClient::participantRemovedEvent(
 	}
 	else
 	{
+		// a late arriving event on a session we have already left.
 		LL_DEBUGS("Voice") << "unknown session " << sessionHandle << LL_ENDL;
 	}
 }
@@ -3468,7 +3471,7 @@ void LLVivoxVoiceClient::participantUpdatedEvent(
 	}
 	else
 	{
-		LL_INFOS("Voice") << "unknown session " << sessionHandle << LL_ENDL;
+		LL_DEBUGS("Voice") << "unknown session " << sessionHandle << LL_ENDL;
 	}
 }
 
diff --git a/indra/newview/viewer_manifest.py b/indra/newview/viewer_manifest.py
index 32cf9d3df6407567fe47059c28886487fb2c9e37..32c4350b400ee1552eb6f0c5d67ab2e3b95db2d4 100755
--- a/indra/newview/viewer_manifest.py
+++ b/indra/newview/viewer_manifest.py
@@ -396,8 +396,6 @@ def construct(self):
             self.path("vivoxsdk.dll")
             self.path("ortp.dll")
             self.path("libsndfile-1.dll")
-            self.path("zlib1.dll")
-            self.path("vivoxplatform.dll")
             self.path("vivoxoal.dll")
             self.path("ca-bundle.crt")