diff --git a/kernel/trunk/network/socket.inc b/kernel/trunk/network/socket.inc
index d212fe163e..ddc71dc145 100644
--- a/kernel/trunk/network/socket.inc
+++ b/kernel/trunk/network/socket.inc
@@ -729,7 +729,6 @@ SOCKET_close:
 
         mov     dword [esp+32], 0                               ; The socket exists, so we will succeed in closing it.
 
-  .socket:
         or      [eax + SOCKET.options], SO_NONBLOCK             ; Mark the socket as non blocking, we dont want it to block any longer!
 
         test    [eax + SOCKET.state], SS_BLOCKED                ; Is the socket still in blocked state?
@@ -1924,16 +1923,16 @@ SOCKET_free:
 
         DEBUGF  DEBUG_NETWORK_VERBOSE, "SOCKET_free: %x\n", eax
 
-        call    SOCKET_check
-        jz      .error
-
-        push    ebx
-
         pusha
         mov     ecx, socket_mutex
         call    mutex_lock
         popa
 
+        call    SOCKET_check
+        jz      .error
+
+        push    ebx
+
         pusha
         lea     ecx, [eax + SOCKET.mutex]
         call    mutex_lock
@@ -1951,6 +1950,7 @@ SOCKET_free:
         mov     eax, ebx
   .no_tcp:
 
+        DEBUGF  DEBUG_NETWORK_VERBOSE, "SOCKET_free: freeing socket %x\n", eax
         push    eax                             ; this will be passed to kernel_free
         mov     ebx, [eax + SOCKET.NextPtr]
         mov     eax, [eax + SOCKET.PrevPtr]
@@ -1970,14 +1970,15 @@ SOCKET_free:
         call    kernel_free
         pop     ebx
 
+        DEBUGF  DEBUG_NETWORK_VERBOSE, "SOCKET_free: success!\n"
+
+  .error:
+
         pusha
         mov     ecx, socket_mutex
         call    mutex_unlock
         popa
 
-        DEBUGF  DEBUG_NETWORK_VERBOSE, "SOCKET_free: success!\n"
-
-  .error:
         ret
 
 ;------------------------------------
@@ -2125,11 +2126,6 @@ SOCKET_check:
 
         DEBUGF  DEBUG_NETWORK_VERBOSE, "SOCKET_check: %x\n", eax
 
-        pusha
-        mov     ecx, socket_mutex
-        call    mutex_lock
-        popa
-
         push    ebx
         mov     ebx, net_sockets
 
@@ -2145,11 +2141,6 @@ SOCKET_check:
         test    eax, eax
         pop     ebx
 
-        pusha
-        mov     ecx, socket_mutex
-        call    mutex_unlock
-        popa
-
         ret
 
 
@@ -2229,7 +2220,19 @@ SOCKET_process_end:
         popa
 
         pusha
-        call    SOCKET_close.socket
+        cmp     [eax + SOCKET.Domain], AF_INET4
+        jne     .free
+
+        cmp     [eax + SOCKET.Protocol], IP_PROTO_TCP
+        jne     .free
+
+        call    TCP_close
+        jmp     .closed
+
+  .free:
+        call    SOCKET_free
+
+  .closed:
         popa
 
         pusha
diff --git a/kernel/trunk/network/tcp_input.inc b/kernel/trunk/network/tcp_input.inc
index f778bdb49e..dd3bc9187c 100644
--- a/kernel/trunk/network/tcp_input.inc
+++ b/kernel/trunk/network/tcp_input.inc
@@ -1170,9 +1170,17 @@ TCP_process_input:
   .ack_la:
         jnc     .ack_processed
 
+        push    ebx
+        lea     ecx, [ebx + SOCKET.mutex]
+        call    mutex_unlock
+        pop     ebx
+
+        push    ebx
         mov     eax, ebx
         call    TCP_disconnect
-        jmp     .drop
+        pop     ebx
+
+        jmp     .destroy_new_socket
 
   .ack_tw:
         mov     [ebx + TCP_SOCKET.timer_timed_wait], 2 * TCP_time_MSL
diff --git a/kernel/trunk/network/tcp_output.inc b/kernel/trunk/network/tcp_output.inc
index b3fd2ae952..fe616d81aa 100644
--- a/kernel/trunk/network/tcp_output.inc
+++ b/kernel/trunk/network/tcp_output.inc
@@ -35,6 +35,8 @@ TCP_output:
         call    mutex_lock
         pop     eax
 
+        DEBUGF  DEBUG_NETWORK_VERBOSE, "TCP_output: socket locked\n"
+
 ; We'll detect the length of the data to be transmitted, and flags to be used
 ; If there is some data, or any critical controls to send (SYN / RST), then transmit
 ; Otherwise, investigate further
@@ -216,6 +218,7 @@ TCP_output:
         mov     ebx, TCP_max_win
         shl     ebx, cl
         pop     ecx
+
         cmp     ebx, ecx
         jb      @f
         mov     ebx, ecx
@@ -571,6 +574,8 @@ TCP_send:
 ;--------------
 ; unlock socket
 
+        DEBUGF  DEBUG_NETWORK_VERBOSE, "TCP_send: unlocking socket 0x%x\n", eax
+
         push    eax
         lea     ecx, [eax + SOCKET.mutex]
         call    mutex_unlock
@@ -607,7 +612,8 @@ TCP_send:
 
 
   .send_error:
-        add     esp, 8
+        add     esp, 4
+        pop     eax
 
         lea     ecx, [eax + SOCKET.mutex]
         call    mutex_unlock
diff --git a/kernel/trunk/network/tcp_usreq.inc b/kernel/trunk/network/tcp_usreq.inc
index 9e219e93ef..3ed7b32d28 100644
--- a/kernel/trunk/network/tcp_usreq.inc
+++ b/kernel/trunk/network/tcp_usreq.inc
@@ -97,6 +97,9 @@ TCP_disconnect:
 
         call    SOCKET_is_disconnecting
         call    TCP_usrclosed
+
+        push    eax
         call    TCP_output
+        pop     eax
 
         ret
\ No newline at end of file