diff --git a/src/client/io_loop.rs b/src/client/io_loop.rs
index b108c1ad0..e4e604cde 100644
--- a/src/client/io_loop.rs
+++ b/src/client/io_loop.rs
@@ -1,5 +1,5 @@
 use crate::client::{
-    Client, CodecFormat, FileManager, MediaData, MediaSender, QualityStatus, MILLI1, SEC30,
+    Client, CodecFormat, MediaData, MediaSender, QualityStatus, MILLI1, SEC30,
     SERVER_CLIPBOARD_ENABLED, SERVER_FILE_TRANSFER_ENABLED, SERVER_KEYBOARD_ENABLED,
 };
 use crate::common;
@@ -15,7 +15,7 @@ use crate::{client::Data, client::Interface};
 use hbb_common::config::{PeerConfig, TransferSerde};
 use hbb_common::fs::{
     can_enable_overwrite_detection, get_job, get_string, new_send_confirm, DigestCheckResult,
-    RemoveJobMeta, TransferJobMeta,
+    RemoveJobMeta,
 };
 use hbb_common::message_proto::permission_info::Permission;
 use hbb_common::protobuf::Message as _;
@@ -23,6 +23,7 @@ use hbb_common::rendezvous_proto::ConnType;
 use hbb_common::tokio::{
     self,
     sync::mpsc,
+    sync::Mutex as TokioMutex,
     time::{self, Duration, Instant, Interval},
 };
 use hbb_common::{
@@ -113,15 +114,23 @@ impl<T: InvokeUiSession> Remote<T> {
                 // just build for now
                 #[cfg(not(windows))]
                 let (_tx_holder, mut rx_clip_client) = mpsc::unbounded_channel::<i32>();
+
                 #[cfg(windows)]
-                let (client_conn_id, rx_clip_client1) =
-                    clipboard::get_rx_cliprdr_client(&self.handler.id);
+                let (_tx_holder, rx) = mpsc::unbounded_channel();
                 #[cfg(windows)]
-                let mut rx_clip_client = rx_clip_client1.lock().await;
+                let mut rx_clip_client_lock = Arc::new(TokioMutex::new(rx));
                 #[cfg(windows)]
                 {
-                    self.client_conn_id = client_conn_id;
+                    let is_conn_not_default = self.handler.is_file_transfer()
+                        || self.handler.is_port_forward()
+                        || self.handler.is_rdp();
+                    if !is_conn_not_default {
+                        (self.client_conn_id, rx_clip_client_lock) =
+                            clipboard::get_rx_cliprdr_client(&self.handler.id);
+                    };
                 }
+                #[cfg(windows)]
+                let mut rx_clip_client = rx_clip_client_lock.lock().await;
 
                 let mut status_timer = time::interval(Duration::new(1, 0));
 
diff --git a/src/common.rs b/src/common.rs
index 3022e5b56..8a9890319 100644
--- a/src/common.rs
+++ b/src/common.rs
@@ -1,5 +1,4 @@
 use std::{
-    collections::HashMap,
     future::Future,
     sync::{Arc, Mutex},
 };
diff --git a/src/server/input_service.rs b/src/server/input_service.rs
index 2f2dd7743..546013673 100644
--- a/src/server/input_service.rs
+++ b/src/server/input_service.rs
@@ -725,7 +725,7 @@ fn legacy_keyboard_mode(evt: &KeyEvent) {
     // disable numlock if press home etc when numlock is on,
     // because we will get numpad value (7,8,9 etc) if not
     #[cfg(windows)]
-    let mut disable_numlock = false;
+    let mut _disable_numlock = false;
     #[cfg(target_os = "macos")]
     en.reset_flag();
     // When long-pressed the command key, then press and release
@@ -775,8 +775,8 @@ fn legacy_keyboard_mode(evt: &KeyEvent) {
             if let Some(key) = KEY_MAP.get(&ck.value()) {
                 #[cfg(windows)]
                 if let Some(_) = NUMPAD_KEY_MAP.get(&ck.value()) {
-                    disable_numlock = en.get_key_state(Key::NumLock);
-                    if disable_numlock {
+                    _disable_numlock = en.get_key_state(Key::NumLock);
+                    if _disable_numlock {
                         en.key_down(Key::NumLock).ok();
                         en.key_up(Key::NumLock);
                     }
diff --git a/src/server/video_service.rs b/src/server/video_service.rs
index b583a0ae3..5927bddec 100644
--- a/src/server/video_service.rs
+++ b/src/server/video_service.rs
@@ -468,6 +468,7 @@ fn run(sp: GenericService) -> ResultType<()> {
     #[cfg(windows)]
     start_uac_elevation_check();
 
+    #[cfg(target_os = "linux")]
     let mut would_block_count = 0u32;
 
     while sp.ok() {
@@ -570,9 +571,9 @@ fn run(sp: GenericService) -> ResultType<()> {
                     try_gdi += 1;
                 }
 
-                would_block_count += 1;
                 #[cfg(target_os = "linux")]
                 {
+                    would_block_count += 1;
                     if !scrap::is_x11() {
                         if would_block_count >= 100 {
                             // For now, the user should choose and agree screen sharing agiain.
@@ -600,7 +601,10 @@ fn run(sp: GenericService) -> ResultType<()> {
                 return Err(err.into());
             }
             _ => {
-                would_block_count = 0;
+                #[cfg(target_os = "linux")]
+                {
+                    would_block_count = 0;
+                }
             }
         }
 
diff --git a/src/ui.rs b/src/ui.rs
index c25aaf670..b11e574ba 100644
--- a/src/ui.rs
+++ b/src/ui.rs
@@ -15,7 +15,7 @@ use hbb_common::{
     protobuf::Message as _,
     rendezvous_proto::*,
     tcp::FramedStream,
-    tokio::{self, sync::mpsc, time},
+    tokio::{self, sync::mpsc},
 };
 
 use crate::common::get_app_name;
diff --git a/src/ui/remote.rs b/src/ui/remote.rs
index ce10827c4..62df85250 100644
--- a/src/ui/remote.rs
+++ b/src/ui/remote.rs
@@ -18,8 +18,6 @@ use hbb_common::{
     allow_err, fs::TransferJobMeta, log, message_proto::*, rendezvous_proto::ConnType,
 };
 
-#[cfg(windows)]
-use crate::clipboard_file::*;
 use crate::{
     client::*,
     ui_interface::has_hwcodec,
diff --git a/src/ui_cm_interface.rs b/src/ui_cm_interface.rs
index 7296f8738..5fb3c76fd 100644
--- a/src/ui_cm_interface.rs
+++ b/src/ui_cm_interface.rs
@@ -11,7 +11,7 @@ use std::{
 };
 
 #[cfg(windows)]
-use clipboard::{cliprdr::CliprdrClientContext, empty_clipboard, ContextSend};
+use clipboard::{cliprdr::CliprdrClientContext, empty_clipboard, set_conn_enabled, ContextSend};
 use serde_derive::Serialize;
 
 use crate::ipc::{self, new_listener, Connection, Data};
@@ -247,10 +247,10 @@ impl<T: InvokeUiCM> IpcTaskRunner<T> {
                     .await
             );
         }
-        clipboard::set_conn_enabled(conn_id, enabled);
+        set_conn_enabled(conn_id, enabled);
         if !enabled {
             ContextSend::proc(|context: &mut Box<CliprdrClientContext>| -> u32 {
-                clipboard::empty_clipboard(context, conn_id);
+                empty_clipboard(context, conn_id);
                 0
             });
         }