联合优网Shadow Defender 、影子卫士、影子系统是一款体积小巧却功能强大的系统还原、保护程序，支持多分区，支持转储，支持排除，工作原理类似于沙盘软件的轻量级系统保护工具。它的不同之处在于支持排除与转储功能，可以把处于影子模式中的文件或文件夹置入排除列表，所有更改将被保存到原始分区。它占用系统资源极低。关闭进程后保护依然有效，特别是在转储和排除方面胜人一筹！
影子卫士Shadow Defender现已小幅升级至v1.4.0.672，这次修正了在Win10周年更新版上的问题。最近主要增加了在影子模式中休眠功能，现在可以使用系统快速启动功能。带注册码和注册机及官方简体中文语言！软件有着漂亮的界面和直观的设置选项，桌面上的提示标签很漂亮，还可以随时移动并且可以此唤出主界面，给人感觉超棒。特别是在转储和排除方面胜人一筹。
软件特色
1、防止所有病毒和恶意软件对电脑的攻击。
2、安心上网，消除不必要的痕迹。
3、保护您的隐私。
4、消除系统停机时间和维护成本。
5、重新启动后电脑系统便可以还原回其原始状态。
Shadow Defender与Powershadow(影子系统)相比优势：
1：程序核心更为先进，程序体积虽然只有Powershadow(影子系统)的1/83，但是绝不逊色。
2：从我个人研究的角度来说Shadow Defender更为安全，保护能力更强大，占用系统内存更小。
Shadow Defender Features
- 1. Prevent all viruses and malwares.
- 2. Surf the internet safely and eliminate unwanted traces.
- 3. Protect your privacy.
- 4. Eliminate system downtime and maintenance costs.
- 5. Reboot to restore your system back to its original state.
Shadow Defender Users
- 1. Maintain a system free from malicious activities and unwanted changes.
- 2. Test software and game installations in a safe environment.
- 3. Protect against unwanted changes by shared users (suitable for workplaces and educational institutions).
新版变化：
Version 1.4.0.665 – April 11, 2017
New: Supports Windows 10 Creators Update.
New: Setup.exe supports command argument: /silent /config:<path-to-config-file>.
New: Some GUI changes.
New: Supports customized desktop tip icon.
Version 1.4.0.648 – August 5, 2016
New: Add the ability to exclude HKEY_LOCAL_MACHINE\Security Registry Item.
Fixed: Fix a bug related to the latest Windows 10 updates.
Version 1.4.0.636 – June 26, 2016
New: Increase the compatibility.
Fixed: A missing icon in Windows registry.
Version 1.4.0.629 – May 3, 2016
New: Add the ability to exclude HKEY_LOCAL_MACHINE\SAM Registry Item.
Fixed: Some minor bugs and changes.
Version 1.4.0.623 – April 14, 2016
Fixed: compatible with Windows Explorer replacement software.
Fixed: compatible with Emsisoft Internet Security.
Version 1.4.0.617 – April 3, 2016
Fixed: Fix a bug related to Windows Update in Windows 10.
Version 1.4.0.612 – March 17, 2016
Fixed: Fix a bug related to Windows Update in Windows 10.
Fixed: Some minor bugs.
Version 1.4.0.608 – November 25, 2015
Fixed: Fix a bug related to Exclusion List.
Fixed: Fix a bug related to Windows Update in Windows 10 Home Edition.
Fixed: Some minor bugs.
官网下载：
http://www.shadowdefender.com/download/SD1.4.0.672_Setup.exe
官网下载（简体中文语言包）
http://www.shadowdefender.com/download/Lang/561/CHS/res.ini
Download 百度云盘：
链接: https://pan.baidu.com/s/1hsO7BjI 密码: sfx4
FX4T6-EU95D-KWG9W-6RDBS-RVVQ7
或 B9UMA-E6HDE-2AC65-S36MD-93C84
