diff --git a/src/bitcoin-cli.cpp b/src/bitcoin-cli.cpp
index 668d492d6..f273a1571 100644
--- a/src/bitcoin-cli.cpp
+++ b/src/bitcoin-cli.cpp
@@ -15,8 +15,6 @@
 #define _(x) std::string(x) /* Keep the _() around in case gettext or such will be used later to translate non-UI */
 
 using namespace std;
-using namespace boost;
-using namespace boost::asio;
 using namespace json_spirit;
 
 std::string HelpMessageCli()
@@ -108,12 +106,12 @@ Object CallRPC(const string& strMethod, const Array& params)
 
     // Connect to localhost
     bool fUseSSL = GetBoolArg("-rpcssl", false);
-    asio::io_service io_service;
-    ssl::context context(io_service, ssl::context::sslv23);
-    context.set_options(ssl::context::no_sslv2 | ssl::context::no_sslv3);
-    asio::ssl::stream<asio::ip::tcp::socket> sslStream(io_service, context);
-    SSLIOStreamDevice<asio::ip::tcp> d(sslStream, fUseSSL);
-    iostreams::stream< SSLIOStreamDevice<asio::ip::tcp> > stream(d);
+    boost::asio::io_service io_service;
+    boost::asio::ssl::context context(io_service, boost::asio::ssl::context::sslv23);
+    context.set_options(boost::asio::ssl::context::no_sslv2 | boost::asio::ssl::context::no_sslv3);
+    boost::asio::ssl::stream<boost::asio::ip::tcp::socket> sslStream(io_service, context);
+    SSLIOStreamDevice<boost::asio::ip::tcp> d(sslStream, fUseSSL);
+    boost::iostreams::stream< SSLIOStreamDevice<boost::asio::ip::tcp> > stream(d);
 
     const bool fConnected = d.connect(GetArg("-rpcconnect", "127.0.0.1"), GetArg("-rpcport", itostr(BaseParams().RPCPort())));
     if (!fConnected)
diff --git a/src/core_read.cpp b/src/core_read.cpp
index 799903066..85b60e9ad 100644
--- a/src/core_read.cpp
+++ b/src/core_read.cpp
@@ -20,7 +20,6 @@
 #include <boost/algorithm/string/split.hpp>
 #include <boost/assign/list_of.hpp>
 
-using namespace boost;
 using namespace boost::algorithm;
 using namespace std;
 
diff --git a/src/db.cpp b/src/db.cpp
index 94629968d..fcc177f1c 100644
--- a/src/db.cpp
+++ b/src/db.cpp
@@ -24,7 +24,6 @@
 #include <openssl/rand.h>
 
 using namespace std;
-using namespace boost;
 
 
 unsigned int nWalletDBUpdated;
@@ -73,9 +72,9 @@ bool CDBEnv::Open(const boost::filesystem::path& pathIn)
     boost::this_thread::interruption_point();
 
     path = pathIn;
-    filesystem::path pathLogDir = path / "database";
+    boost::filesystem::path pathLogDir = path / "database";
     TryCreateDirectory(pathLogDir);
-    filesystem::path pathErrorFile = path / "db.log";
+    boost::filesystem::path pathErrorFile = path / "db.log";
     LogPrintf("CDBEnv::Open : LogDir=%s ErrorFile=%s\n", pathLogDir.string(), pathErrorFile.string());
 
     unsigned int nEnvFlags = 0;
diff --git a/src/init.cpp b/src/init.cpp
index a09caeea4..1b0c909b9 100644
--- a/src/init.cpp
+++ b/src/init.cpp
@@ -43,7 +43,6 @@
 #include <boost/thread.hpp>
 #include <openssl/crypto.h>
 
-using namespace boost;
 using namespace std;
 
 #ifdef ENABLE_WALLET
@@ -427,12 +426,12 @@ void ThreadImport(std::vector<boost::filesystem::path> vImportFiles)
     }
 
     // hardcoded $DATADIR/bootstrap.dat
-    filesystem::path pathBootstrap = GetDataDir() / "bootstrap.dat";
-    if (filesystem::exists(pathBootstrap)) {
+    boost::filesystem::path pathBootstrap = GetDataDir() / "bootstrap.dat";
+    if (boost::filesystem::exists(pathBootstrap)) {
         FILE *file = fopen(pathBootstrap.string().c_str(), "rb");
         if (file) {
             CImportingNow imp;
-            filesystem::path pathBootstrapOld = GetDataDir() / "bootstrap.dat.old";
+            boost::filesystem::path pathBootstrapOld = GetDataDir() / "bootstrap.dat.old";
             LogPrintf("Importing bootstrap.dat...\n");
             LoadExternalBlockFile(file);
             RenameOver(pathBootstrap, pathBootstrapOld);
@@ -816,7 +815,7 @@ bool AppInit2(boost::thread_group& threadGroup)
                 return false;
         }
 
-        if (filesystem::exists(GetDataDir() / strWalletFile))
+        if (boost::filesystem::exists(GetDataDir() / strWalletFile))
         {
             CDBEnv::VerifyResult r = bitdb.Verify(strWalletFile, CWalletDB::Recover);
             if (r == CDBEnv::RECOVER_OK)
@@ -937,20 +936,20 @@ bool AppInit2(boost::thread_group& threadGroup)
     fReindex = GetBoolArg("-reindex", false);
 
     // Upgrading to 0.8; hard-link the old blknnnn.dat files into /blocks/
-    filesystem::path blocksDir = GetDataDir() / "blocks";
-    if (!filesystem::exists(blocksDir))
+    boost::filesystem::path blocksDir = GetDataDir() / "blocks";
+    if (!boost::filesystem::exists(blocksDir))
     {
-        filesystem::create_directories(blocksDir);
+        boost::filesystem::create_directories(blocksDir);
         bool linked = false;
         for (unsigned int i = 1; i < 10000; i++) {
-            filesystem::path source = GetDataDir() / strprintf("blk%04u.dat", i);
-            if (!filesystem::exists(source)) break;
-            filesystem::path dest = blocksDir / strprintf("blk%05u.dat", i-1);
+            boost::filesystem::path source = GetDataDir() / strprintf("blk%04u.dat", i);
+            if (!boost::filesystem::exists(source)) break;
+            boost::filesystem::path dest = blocksDir / strprintf("blk%05u.dat", i-1);
             try {
-                filesystem::create_hard_link(source, dest);
+                boost::filesystem::create_hard_link(source, dest);
                 LogPrintf("Hardlinked %s -> %s\n", source.string(), dest.string());
                 linked = true;
-            } catch (const filesystem::filesystem_error& e) {
+            } catch (const boost::filesystem::filesystem_error& e) {
                 // Note: hardlink creation failing is not a disaster, it just means
                 // blocks will get re-downloaded from peers.
                 LogPrintf("Error hardlinking blk%04u.dat : %s\n", i, e.what());
diff --git a/src/main.cpp b/src/main.cpp
index f02a6a12e..f768f1e29 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -28,7 +28,6 @@
 #include <boost/filesystem/fstream.hpp>
 #include <boost/thread.hpp>
 
-using namespace boost;
 using namespace std;
 
 #if defined(NDEBUG)
@@ -2788,7 +2787,7 @@ bool AbortNode(const std::string &strMessage, const std::string &userMessage) {
 
 bool CheckDiskSpace(uint64_t nAdditionalBytes)
 {
-    uint64_t nFreeBytesAvailable = filesystem::space(GetDataDir()).available;
+    uint64_t nFreeBytesAvailable = boost::filesystem::space(GetDataDir()).available;
 
     // Check for nMinDiskSpace bytes (currently 50MB)
     if (nFreeBytesAvailable < nMinDiskSpace + nAdditionalBytes)
diff --git a/src/net.cpp b/src/net.cpp
index 6401ecbf8..d07882c7f 100644
--- a/src/net.cpp
+++ b/src/net.cpp
@@ -49,7 +49,6 @@
 #endif
 #endif
 
-using namespace boost;
 using namespace std;
 
 namespace {
diff --git a/src/qt/paymentserver.cpp b/src/qt/paymentserver.cpp
index b3dbb693d..66331ee4b 100644
--- a/src/qt/paymentserver.cpp
+++ b/src/qt/paymentserver.cpp
@@ -46,7 +46,6 @@
 #include <QUrlQuery>
 #endif
 
-using namespace boost;
 using namespace std;
 
 const int BITCOIN_IPC_CONNECT_TIMEOUT = 1000; // milliseconds
diff --git a/src/rpcmisc.cpp b/src/rpcmisc.cpp
index 7c08a5c24..101341818 100644
--- a/src/rpcmisc.cpp
+++ b/src/rpcmisc.cpp
@@ -23,7 +23,6 @@
 #include "json/json_spirit_utils.h"
 #include "json/json_spirit_value.h"
 
-using namespace boost;
 using namespace boost::assign;
 using namespace json_spirit;
 using namespace std;
diff --git a/src/rpcprotocol.cpp b/src/rpcprotocol.cpp
index c4d6f06b1..b08598d0b 100644
--- a/src/rpcprotocol.cpp
+++ b/src/rpcprotocol.cpp
@@ -26,7 +26,6 @@
 #include "json/json_spirit_writer_template.h"
 
 using namespace std;
-using namespace boost;
 using namespace boost::asio;
 using namespace json_spirit;
 
diff --git a/src/rpcrawtransaction.cpp b/src/rpcrawtransaction.cpp
index b87a8baac..35319e480 100644
--- a/src/rpcrawtransaction.cpp
+++ b/src/rpcrawtransaction.cpp
@@ -25,7 +25,6 @@
 #include "json/json_spirit_utils.h"
 #include "json/json_spirit_value.h"
 
-using namespace boost;
 using namespace boost::assign;
 using namespace json_spirit;
 using namespace std;
diff --git a/src/rpcserver.cpp b/src/rpcserver.cpp
index 210c7fe97..a070ab5bb 100644
--- a/src/rpcserver.cpp
+++ b/src/rpcserver.cpp
@@ -26,7 +26,6 @@
 #include <boost/thread.hpp>
 #include "json/json_spirit_writer_template.h"
 
-using namespace boost;
 using namespace boost::asio;
 using namespace json_spirit;
 using namespace std;
@@ -39,7 +38,7 @@ static std::string rpcWarmupStatus("RPC server started");
 static CCriticalSection cs_rpcWarmup;
 
 //! These are created by StartRPCThreads, destroyed in StopRPCThreads
-static asio::io_service* rpc_io_service = NULL;
+static boost::asio::io_service* rpc_io_service = NULL;
 static map<string, boost::shared_ptr<deadline_timer> > deadlineTimers;
 static ssl::context* rpc_ssl_context = NULL;
 static boost::thread_group* rpc_worker_group = NULL;
@@ -428,7 +427,7 @@ class AcceptedConnectionImpl : public AcceptedConnection
 {
 public:
     AcceptedConnectionImpl(
-            asio::io_service& io_service,
+            boost::asio::io_service& io_service,
             ssl::context &context,
             bool fUseSSL) :
         sslStream(io_service, context),
@@ -453,11 +452,11 @@ public:
     }
 
     typename Protocol::endpoint peer;
-    asio::ssl::stream<typename Protocol::socket> sslStream;
+    boost::asio::ssl::stream<typename Protocol::socket> sslStream;
 
 private:
     SSLIOStreamDevice<Protocol> _d;
-    iostreams::stream< SSLIOStreamDevice<Protocol> > _stream;
+    boost::iostreams::stream< SSLIOStreamDevice<Protocol> > _stream;
 };
 
 void ServiceConnection(AcceptedConnection *conn);
@@ -504,7 +503,7 @@ static void RPCAcceptHandler(boost::shared_ptr< basic_socket_acceptor<Protocol,
                              const boost::system::error_code& error)
 {
     // Immediately start accepting new connections, except when we're cancelled or our socket is closed.
-    if (error != asio::error::operation_aborted && acceptor->is_open())
+    if (error != boost::asio::error::operation_aborted && acceptor->is_open())
         RPCListen(acceptor, context, fUseSSL);
 
     AcceptedConnectionImpl<ip::tcp>* tcp_conn = dynamic_cast< AcceptedConnectionImpl<ip::tcp>* >(conn.get());
@@ -535,7 +534,7 @@ static ip::tcp::endpoint ParseEndpoint(const std::string &strEndpoint, int defau
     std::string addr;
     int port = defaultPort;
     SplitHostPort(strEndpoint, port, addr);
-    return ip::tcp::endpoint(asio::ip::address::from_string(addr), port);
+    return ip::tcp::endpoint(boost::asio::ip::address::from_string(addr), port);
 }
 
 void StartRPCThreads()
@@ -590,7 +589,7 @@ void StartRPCThreads()
     }
 
     assert(rpc_io_service == NULL);
-    rpc_io_service = new asio::io_service();
+    rpc_io_service = new boost::asio::io_service();
     rpc_ssl_context = new ssl::context(*rpc_io_service, ssl::context::sslv23);
 
     const bool fUseSSL = GetBoolArg("-rpcssl", false);
@@ -599,14 +598,14 @@ void StartRPCThreads()
     {
         rpc_ssl_context->set_options(ssl::context::no_sslv2 | ssl::context::no_sslv3);
 
-        filesystem::path pathCertFile(GetArg("-rpcsslcertificatechainfile", "server.cert"));
-        if (!pathCertFile.is_complete()) pathCertFile = filesystem::path(GetDataDir()) / pathCertFile;
-        if (filesystem::exists(pathCertFile)) rpc_ssl_context->use_certificate_chain_file(pathCertFile.string());
+        boost::filesystem::path pathCertFile(GetArg("-rpcsslcertificatechainfile", "server.cert"));
+        if (!pathCertFile.is_complete()) pathCertFile = boost::filesystem::path(GetDataDir()) / pathCertFile;
+        if (boost::filesystem::exists(pathCertFile)) rpc_ssl_context->use_certificate_chain_file(pathCertFile.string());
         else LogPrintf("ThreadRPCServer ERROR: missing server certificate file %s\n", pathCertFile.string());
 
-        filesystem::path pathPKFile(GetArg("-rpcsslprivatekeyfile", "server.pem"));
-        if (!pathPKFile.is_complete()) pathPKFile = filesystem::path(GetDataDir()) / pathPKFile;
-        if (filesystem::exists(pathPKFile)) rpc_ssl_context->use_private_key_file(pathPKFile.string(), ssl::context::pem);
+        boost::filesystem::path pathPKFile(GetArg("-rpcsslprivatekeyfile", "server.pem"));
+        if (!pathPKFile.is_complete()) pathPKFile = boost::filesystem::path(GetDataDir()) / pathPKFile;
+        if (boost::filesystem::exists(pathPKFile)) rpc_ssl_context->use_private_key_file(pathPKFile.string(), ssl::context::pem);
         else LogPrintf("ThreadRPCServer ERROR: missing server private key file %s\n", pathPKFile.string());
 
         string strCiphers = GetArg("-rpcsslciphers", "TLSv1.2+HIGH:TLSv1+HIGH:!SSLv2:!aNULL:!eNULL:!3DES:@STRENGTH");
@@ -618,8 +617,8 @@ void StartRPCThreads()
     int defaultPort = GetArg("-rpcport", BaseParams().RPCPort());
     if (!mapArgs.count("-rpcallowip")) // Default to loopback if not allowing external IPs
     {
-        vEndpoints.push_back(ip::tcp::endpoint(asio::ip::address_v6::loopback(), defaultPort));
-        vEndpoints.push_back(ip::tcp::endpoint(asio::ip::address_v4::loopback(), defaultPort));
+        vEndpoints.push_back(ip::tcp::endpoint(boost::asio::ip::address_v6::loopback(), defaultPort));
+        vEndpoints.push_back(ip::tcp::endpoint(boost::asio::ip::address_v4::loopback(), defaultPort));
         if (mapArgs.count("-rpcbind"))
         {
             LogPrintf("WARNING: option -rpcbind was ignored because -rpcallowip was not specified, refusing to allow everyone to connect\n");
@@ -641,8 +640,8 @@ void StartRPCThreads()
             }
         }
     } else { // No specific bind address specified, bind to any
-        vEndpoints.push_back(ip::tcp::endpoint(asio::ip::address_v6::any(), defaultPort));
-        vEndpoints.push_back(ip::tcp::endpoint(asio::ip::address_v4::any(), defaultPort));
+        vEndpoints.push_back(ip::tcp::endpoint(boost::asio::ip::address_v6::any(), defaultPort));
+        vEndpoints.push_back(ip::tcp::endpoint(boost::asio::ip::address_v4::any(), defaultPort));
         // Prefer making the socket dual IPv6/IPv4 instead of binding
         // to both addresses seperately.
         bBindAny = true;
@@ -654,7 +653,7 @@ void StartRPCThreads()
     BOOST_FOREACH(const ip::tcp::endpoint &endpoint, vEndpoints)
     {
         try {
-            asio::ip::address bindAddress = endpoint.address();
+            boost::asio::ip::address bindAddress = endpoint.address();
             straddress = bindAddress.to_string();
             LogPrintf("Binding RPC on address %s port %i (IPv4+IPv6 bind any: %i)\n", straddress, endpoint.port(), bBindAny);
             boost::system::error_code v6_only_error;
@@ -665,7 +664,7 @@ void StartRPCThreads()
 
             // Try making the socket dual IPv6/IPv4 when listening on the IPv6 "any" address
             acceptor->set_option(boost::asio::ip::v6_only(
-                !bBindAny || bindAddress != asio::ip::address_v6::any()), v6_only_error);
+                !bBindAny || bindAddress != boost::asio::ip::address_v6::any()), v6_only_error);
 
             acceptor->bind(endpoint);
             acceptor->listen(socket_base::max_connections);
@@ -675,7 +674,7 @@ void StartRPCThreads()
             fListening = true;
             rpc_acceptors.push_back(acceptor);
             // If dual IPv6/IPv4 bind successful, skip binding to IPv4 separately
-            if(bBindAny && bindAddress == asio::ip::address_v6::any() && !v6_only_error)
+            if(bBindAny && bindAddress == boost::asio::ip::address_v6::any() && !v6_only_error)
                 break;
         }
         catch (const boost::system::system_error& e)
@@ -693,7 +692,7 @@ void StartRPCThreads()
 
     rpc_worker_group = new boost::thread_group();
     for (int i = 0; i < GetArg("-rpcthreads", 4); i++)
-        rpc_worker_group->create_thread(boost::bind(&asio::io_service::run, rpc_io_service));
+        rpc_worker_group->create_thread(boost::bind(&boost::asio::io_service::run, rpc_io_service));
     fRPCRunning = true;
 }
 
@@ -701,12 +700,12 @@ void StartDummyRPCThread()
 {
     if(rpc_io_service == NULL)
     {
-        rpc_io_service = new asio::io_service();
+        rpc_io_service = new boost::asio::io_service();
         /* Create dummy "work" to keep the thread from exiting when no timeouts active,
          * see http://www.boost.org/doc/libs/1_51_0/doc/html/boost_asio/reference/io_service.html#boost_asio.reference.io_service.stopping_the_io_service_from_running_out_of_work */
-        rpc_dummy_work = new asio::io_service::work(*rpc_io_service);
+        rpc_dummy_work = new boost::asio::io_service::work(*rpc_io_service);
         rpc_worker_group = new boost::thread_group();
-        rpc_worker_group->create_thread(boost::bind(&asio::io_service::run, rpc_io_service));
+        rpc_worker_group->create_thread(boost::bind(&boost::asio::io_service::run, rpc_io_service));
         fRPCRunning = true;
     }
 }
@@ -719,7 +718,7 @@ void StopRPCThreads()
 
     // First, cancel all timers and acceptors
     // This is not done automatically by ->stop(), and in some cases the destructor of
-    // asio::io_service can hang if this is skipped.
+    // boost::asio::io_service can hang if this is skipped.
     boost::system::error_code ec;
     BOOST_FOREACH(const boost::shared_ptr<ip::tcp::acceptor> &acceptor, rpc_acceptors)
     {
@@ -787,7 +786,7 @@ void RPCRunLater(const std::string& name, boost::function<void(void)> func, int6
         deadlineTimers.insert(make_pair(name,
                                         boost::shared_ptr<deadline_timer>(new deadline_timer(*rpc_io_service))));
     }
-    deadlineTimers[name]->expires_from_now(posix_time::seconds(nSeconds));
+    deadlineTimers[name]->expires_from_now(boost::posix_time::seconds(nSeconds));
     deadlineTimers[name]->async_wait(boost::bind(RPCRunHandler, _1, func));
 }
 
diff --git a/src/rpcwallet.cpp b/src/rpcwallet.cpp
index 56be6dba1..a6b38ead6 100644
--- a/src/rpcwallet.cpp
+++ b/src/rpcwallet.cpp
@@ -23,7 +23,6 @@
 #include "json/json_spirit_value.h"
 
 using namespace std;
-using namespace boost;
 using namespace boost::assign;
 using namespace json_spirit;
 
diff --git a/src/walletdb.cpp b/src/walletdb.cpp
index 4fd7eb512..668130ed6 100644
--- a/src/walletdb.cpp
+++ b/src/walletdb.cpp
@@ -18,7 +18,6 @@
 #include <boost/scoped_ptr.hpp>
 #include <boost/thread.hpp>
 
-using namespace boost;
 using namespace std;
 
 static uint64_t nAccountingEntryNumber = 0;
@@ -865,20 +864,20 @@ bool BackupWallet(const CWallet& wallet, const string& strDest)
                 bitdb.mapFileUseCount.erase(wallet.strWalletFile);
 
                 // Copy wallet.dat
-                filesystem::path pathSrc = GetDataDir() / wallet.strWalletFile;
-                filesystem::path pathDest(strDest);
-                if (filesystem::is_directory(pathDest))
+                boost::filesystem::path pathSrc = GetDataDir() / wallet.strWalletFile;
+                boost::filesystem::path pathDest(strDest);
+                if (boost::filesystem::is_directory(pathDest))
                     pathDest /= wallet.strWalletFile;
 
                 try {
 #if BOOST_VERSION >= 104000
-                    filesystem::copy_file(pathSrc, pathDest, filesystem::copy_option::overwrite_if_exists);
+                    boost::filesystem::copy_file(pathSrc, pathDest, boost::filesystem::copy_option::overwrite_if_exists);
 #else
-                    filesystem::copy_file(pathSrc, pathDest);
+                    boost::filesystem::copy_file(pathSrc, pathDest);
 #endif
                     LogPrintf("copied wallet.dat to %s\n", pathDest.string());
                     return true;
-                } catch (const filesystem::filesystem_error& e) {
+                } catch (const boost::filesystem::filesystem_error& e) {
                     LogPrintf("error copying wallet.dat to %s - %s\n", pathDest.string(), e.what());
                     return false;
                 }