diff --git a/src/socket_base.cpp b/src/socket_base.cpp
index a9ffc017..d6d5d4e3 100644
--- a/src/socket_base.cpp
+++ b/src/socket_base.cpp
@@ -598,8 +598,6 @@ int zmq::socket_base_t::connect (const char *addr_)
         //  Do some basic sanity checks on tcp:// address syntax
         //  - hostname starts with digit or letter, with embedded '-' or '.'
         //  - IPv6 address may contain hex chars and colons.
-        //  - IPv6 link local address may contain % followed by interface name / zone_id
-        //    (Reference: https://tools.ietf.org/html/rfc4007)
         //  - IPv4 address may contain decimal digits and dots.
         //  - Address must end in ":port" where port is *, or numeric
         //  - Address may contain two parts separated by ':'
@@ -610,8 +608,8 @@ int zmq::socket_base_t::connect (const char *addr_)
             check++;
             while (isalnum  (*check)
                 || isxdigit (*check)
-                || *check == '.' || *check == '-' || *check == ':' || *check == '%'
-                || *check == ';' || *check == ']')
+                || *check == '.' || *check == '-' || *check == ':'|| *check == ';'
+                || *check == ']')
                 check++;
         }
         //  Assume the worst, now look for success
diff --git a/src/tcp_address.cpp b/src/tcp_address.cpp
index e694b13e..c8689322 100644
--- a/src/tcp_address.cpp
+++ b/src/tcp_address.cpp
@@ -160,7 +160,6 @@ int zmq::tcp_address_t::resolve_nic_name (const char *nic_, bool ipv6_, bool is_
     && defined ZMQ_HAVE_IFADDRS)
 
 #include <ifaddrs.h>
-#include <net/if.h>
 
 //  On these platforms, network interface name can be queried
 //  using getifaddrs function.
@@ -429,23 +428,6 @@ int zmq::tcp_address_t::resolve (const char *name_, bool local_, bool ipv6_, boo
           addr_str [addr_str.size () - 1] == ']')
         addr_str = addr_str.substr (1, addr_str.size () - 2);
 
-    // Test the '%' to know if we have an interface name / zone_id in the address
-    // Reference: https://tools.ietf.org/html/rfc4007
-    std::size_t pos = addr_str.rfind("%");
-    uint32_t zone_id = 0;
-    if (pos != std::string::npos) {
-        std::string if_str = addr_str.substr(pos + 1);
-        addr_str = addr_str.substr(0, pos);
-        if (isalpha (if_str.at (0)))
-            zone_id = if_nametoindex(if_str.c_str());
-        else
-            zone_id = (uint32_t) atoi (if_str.c_str ());
-        if (zone_id == 0) {
-            errno = EINVAL;
-            return -1;
-        }
-    }
-
     //  Allow 0 specifically, to detect invalid port error in atoi if not
     uint16_t port;
     if (port_str == "*" || port_str == "0")
@@ -471,18 +453,14 @@ int zmq::tcp_address_t::resolve (const char *name_, bool local_, bool ipv6_, boo
 
     //  Set the port into the address structure.
     if (is_src_) {
-        if (source_address.generic.sa_family == AF_INET6) {
+        if (source_address.generic.sa_family == AF_INET6)
             source_address.ipv6.sin6_port = htons (port);
-            source_address.ipv6.sin6_scope_id = zone_id;
-        }
         else
             source_address.ipv4.sin_port = htons (port);
     }
     else {
-        if (address.generic.sa_family == AF_INET6) {
+        if (address.generic.sa_family == AF_INET6)
             address.ipv6.sin6_port = htons (port);
-            address.ipv6.sin6_scope_id = zone_id;
-        }
         else
             address.ipv4.sin_port = htons (port);
     }
diff --git a/src/windows.hpp b/src/windows.hpp
index 3f38f491..3ced6adf 100644
--- a/src/windows.hpp
+++ b/src/windows.hpp
@@ -37,9 +37,9 @@
 #define NOMINMAX          // Macros min(a,b) and max(a,b)
 #endif
 
-//  Set target version to Windows Server 2008, Windows Vista or higher.
+//  Set target version to Windows Server 2003, Windows XP/SP1 or higher.
 #ifndef _WIN32_WINNT
-#define _WIN32_WINNT 0x0600
+#define _WIN32_WINNT 0x0501
 #endif
 
 #ifdef __MINGW32__
@@ -54,7 +54,6 @@
 #include <winsock2.h>
 #include <windows.h>
 #include <mswsock.h>
-#include <iphlpapi.h>
 
 #if !defined __MINGW32__
 #include <Mstcpip.h>