diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
new file mode 100644
index 0000000..c50f021
--- /dev/null
+++ b/.github/workflows/test.yml
@@ -0,0 +1,45 @@
+name: Test
+
+on:
+  push:
+    branches:
+    - master
+  pull_request:
+    branches:
+    - master
+
+jobs:
+  linux:
+    name: Linux ubuntu-latest
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v1
+    - name: Build
+      run: cargo build --verbose
+    - name: Run test
+      run: cargo test --verbose
+
+  windows:
+    name: Windows ${{ matrix.os }}
+    runs-on: ${{ matrix.os }}
+    strategy:
+      matrix:
+        os: [windows-10-LTSC-amd64-17763, windows-latest]
+    steps:
+    - uses: actions/checkout@v1
+    - name: Build
+      run: cargo build --verbose
+    - name: Run test
+      run: cargo test --verbose
+
+  macos:
+    name: macOS-latest
+    runs-on: macOS-latest
+    steps:
+    - uses: actions/checkout@v1
+    - name: Get Rust
+      run: curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs > rustup && sh ./rustup -y
+    - name: Build
+      run: source ~/.cargo/env; cargo build --verbose
+    - name: Run test
+      run: source ~/.cargo/env; cargo test --verbose
diff --git a/.travis.yml b/.travis.yml
index 9dc4444..64dec27 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -3,9 +3,9 @@ os:
   - osx
 language: rust
 rust:
-  - stable
-  - beta
-  - nightly
+    -stable
+    -beta
+    -nightly
 cache: rust
 script:
   - cargo test --all --verbose
diff --git a/Cargo.toml b/Cargo.toml
index a89b692..7645259 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -26,3 +26,7 @@ cc = "1"
 
 [dependencies]
 libc = "0.2.29"
+
+[target.'cfg(windows)'.dependencies.winapi]
+version = "0.3"
+features = ["sysinfoapi"]
diff --git a/README.md b/README.md
index 3a6826c..44fbba3 100644
--- a/README.md
+++ b/README.md
@@ -23,3 +23,4 @@ and add this to crate root:
 extern crate sys_info;
 ```
 
+for more usage example, see the source file in test folder.
\ No newline at end of file
diff --git a/lib.rs b/lib.rs
index e13f95f..cfbd1a2 100644
--- a/lib.rs
+++ b/lib.rs
@@ -5,13 +5,16 @@
 //! And now it can get information of kernel/cpu/memory/disk/load/hostname and so on.
 //!
 
+#[cfg(windows)]
+extern crate winapi;
 extern crate libc;
-
 use std::ffi;
 use std::fmt;
 use std::io::{self, Read};
 use std::fs::File;
 use std::os::raw::c_char;
+#[cfg(target_os = "windows")]
+use winapi::um::sysinfoapi;
 
 #[cfg(target_os = "macos")]
 use libc::sysctl;
@@ -22,6 +25,7 @@ use std::ptr::null_mut;
 use libc::timeval;
 
 use std::collections::HashMap;
+ use std::convert::TryInto;
 
 #[cfg(target_os = "macos")]
 static MAC_CTL_KERN: libc::c_int = 1;
@@ -148,7 +152,7 @@ extern "C" {
     fn get_cpu_speed() -> u64;
 
     fn get_loadavg() -> LoadAvg;
-    fn get_proc_total() -> u64;
+    fn get_proc_total() -> usize;
 
     fn get_mem_info() -> MemInfo;
     fn get_disk_info() -> DiskInfo;
@@ -314,16 +318,14 @@ pub fn loadavg() -> Result<LoadAvg, Error> {
 }
 
 /// Get current processes quantity.
-///
-/// Notice, it temporarily does not support Windows.
-pub fn proc_total() -> Result<u64, Error> {
+pub fn proc_total() -> Result<usize, Error> {
     if cfg!(target_os = "linux") {
         let mut s = String::new();
         File::open("/proc/loadavg")?.read_to_string(&mut s)?;
         s.split(' ')
             .nth(3)
             .and_then(|val| val.split('/').last())
-            .and_then(|val| val.parse::<u64>().ok())
+            .and_then(|val| val.parse::<usize>().ok())
             .ok_or(Error::Unknown)
     } else if cfg!(target_os = "macos") || cfg!(target_os = "windows") {
         Ok(unsafe { get_proc_total() })
@@ -413,7 +415,8 @@ pub fn hostname() -> Result<String, Error> {
         .map(|output| String::from_utf8(output.stdout).unwrap().trim().to_string())
 }
 
-/// Get system boottime
+
+/// Get system boottime from unix like system
 #[cfg(not(windows))]
 pub fn boottime() -> Result<timeval, Error> {
     let mut bt = timeval {
@@ -446,6 +449,20 @@ pub fn boottime() -> Result<timeval, Error> {
     Ok(bt)
 }
 
+// get boottime from windows, the  tv_usec is in microsecond = 1000 * millisecond, i just simple set it to 0
+// if you need this value, you can just simply multiply since_boot by 1000...
+#[cfg(windows)]
+pub fn boottime() -> Result<timeval, Error> {
+	let mut bt = timeval {
+        tv_sec: 0,
+        tv_usec: 0
+    };
+	
+	let since_boot: u64 = unsafe { sysinfoapi::GetTickCount64() };
+	bt.tv_sec = (since_boot / 1000).try_into().unwrap();
+	Ok(bt)
+}
+
 #[cfg(test)]
 mod test {
     use super::*;
@@ -518,6 +535,13 @@ mod test {
         println!("boottime(): {} {}", bt.tv_sec, bt.tv_usec);
         assert!(bt.tv_sec > 0 || bt.tv_usec > 0);
     }
+	
+	#[test]
+	#[cfg(windows)]
+	pub fn test_boottime(){
+		let bt = boottime().unwrap();
+		assert!(bt.tv_sec > 0);
+	}
 
     #[test]
     #[cfg(linux)]
diff --git a/test/src/main.rs b/test/src/main.rs
index 4246749..2916b3b 100644
--- a/test/src/main.rs
+++ b/test/src/main.rs
@@ -7,6 +7,7 @@ fn main() {
 
     println!("os: {} {}", os_type().unwrap(), os_release().unwrap());
     println!("cpu: {} cores, {} MHz", cpu_num().unwrap(), cpu_speed().unwrap());
+	//the proc total will work correctly on windows-amd64
     println!("proc total: {}", proc_total().unwrap());
     let load = loadavg().unwrap();
     println!("load: {} {} {}", load.one, load.five, load.fifteen);
@@ -17,6 +18,7 @@ fn main() {
     let disk = disk_info().unwrap();
     println!("disk: total {} KB, free {} KB", disk.total, disk.free);
     println!("hostname: {}", hostname().unwrap());
+	//now boottime works perfectly on windows-amd64 and linux-amd64
     let t = boottime().unwrap();
     println!("boottime {} sec, {} usec", t.tv_sec, t.tv_usec);