左键单击(Left-click)是在计算机上选择和突出显示项目的默认命令。如果鼠标或触控板上的左键单击无法按设计工作，则问题可能是与软件或硬件相关的故障。
如果您使用外接鼠标，如果异物（灰尘、碎屑、污垢等）卡在鼠标中，左键单击可能会发生故障。(left-click might malfunction)请联系鼠标制造商、访问他们的网站或参阅产品说明手册以获取清洁说明。但是，如果您的 PC 的触摸板和/或外接鼠标上的左键单击不起作用，请尝试以下修复。
您需要输入法/设备来实施其中一些故障排除解决方案。例如，如果您的 PC 没有触控功能，请测试几个外接鼠标并检查是否有人在您的 PC 上工作。如果您的 PC 上启用了鼠标键(Mouse Keys is enabled)，您还可以使用键盘选择项目和导航 Windows 。
1.检查鼠标设置
如果您的鼠标或触摸板左键单击用作右键单击，则您的 PC 可能会将右键单击识别为鼠标主按钮。前往Windows 设置(Windows Settings)菜单并切换回左侧按钮。
转到Settings > Devices > Mouse并确保“Select your primary button”选项设置为Left。
2.使用点击点击
单击 PC 的触摸板可兼作左键单击。如果单击触摸板表面时没有任何反应，请尝试将触摸板配置为识别点击。
转到设置(Settings)>设备(Devices)>触摸板(Touchpad)，滚动到“点击”部分，然后选中“用单指点击以单击(Tap with a single finger to single-click)”框。
如果您的 PC 的左键单击仍然无法正常工作，请在任务管理(Task Manager)器中重新启动Windows 资源管理器。(Windows Explorer)
3. 重新启动 Windows 资源管理器
当某些系统进程出现故障时，重新启动Windows 资源管理器(Windows Explorer)可以帮助将它们恢复到正常状态。
- 右键单击(Right-click)任务栏上的空白区域，然后选择任务管理器(Task Manager)。
或者，如果您的 PC 的右键单击按钮也出现故障，请从“快速访问”菜单启动(Quick Access)任务管理器。(Task Manager)按Windows 键(Windows key)+ X按钮并选择任务管理器(Task Manager)。更好的是，使用Ctrl + Shift + Esc键盘快捷键启动任务管理器(Task Manager)。
- 在“Windows 进程”部分中找到并选择Windows 资源管理器。(Windows Explorer)然后(Afterward)，选择重新启动(Restart)按钮。
这将刷新您 PC 的桌面、任务栏和其他依赖Windows 资源管理器(Windows Explorer)的系统进程。按下左键并检查它现在是否有效。
4. 更新、回滚(Roll Back)或卸载鼠标驱动程序(Uninstall Mouse Driver)
鼠标驱动程序损坏、过时或故障可能是左键无法在您的计算机上运行的原因。将鼠标驱动程序更新到最新版本(Updating your mouse driver to the latest version)将消除错误和损坏。但是，如果在安装驱动程序更新后左键停止工作，请卸载更新或从您的 PC 中删除驱动程序。
- 按Windows 键(Windows key)+ X按钮并选择设备管理器(Device Manager)。
- 展开鼠标和其他指针设备(Mice and other pointing devices)类别，右键单击或长按鼠标驱动程序，然后选择属性(Properties)。
- 前往驱动程序选项卡并选择更新驱动程序(Update Driver)以检查您的设备、互联网或Windows 更新(Windows Updates)下载是否有新的驱动程序版本。
在下一页上选择自动搜索驱动程序，然后按照提示更新鼠标驱动程序。(Search automatically for drivers)
- 选择回滚驱动程序(Roll Back Driver)（如果可用）将驱动程序恢复到以前的版本。您还可以阅读我们在 Windows 中回滚驱动程序更新(rolling back a driver update in Windows)的指南以获取详细说明。
如果“回滚驱动程序”选项灰显，请卸载并重新安装鼠标驱动程序。
- 选择卸载设备(Uninstall Device)并在确认提示中选择卸载以从您的 PC 中删除驱动程序。(Uninstall)
之后重新启动您的 PC。如果驱动程序已预先安装，Windows将在您的 PC 重新启动时自动重新安装驱动程序。
如果您使用的是外接鼠标，则可能需要手动重新安装设备的驱动程序。将鼠标连接到计算机应重新安装设备的驱动程序。您也可以从制造商的网站下载并安装鼠标驱动程序。
5.替换丢失或损坏的系统文件(Corrupt System Files)
如果某些重要的系统文件丢失或损坏，您的 PC 的左键单击可能会停止正常工作。我们建议使用Windows 高级系统清理工具(Windows Advanced System Cleanup tools)-系统文件检查器(File Checker)( SFC ) 和部署映像服务(Deployment Image Servicing)和管理(Management)( DISM )运行系统检查并替换任何丢失或损坏的文件。
将您的 PC 连接到互联网并按照以下步骤操作。
- 按Windows 键(Windows key)+ X并在快速访问菜单(Quick Access Menu)中选择命令提示符（管理员）(Command Prompt (Admin))。
- DISM /Online /Cleanup-Image /RestoreHealth到命令提示符(Command Prompt)终端中，然后按Enter。
等待(Wait)该工具扫描您的 PC 以查找损坏的系统文件。然后，当您收到一条消息“恢复操作已成功完成”时，请转到下一步。或者当进度条达到 100% 时。
请注意，这可能需要几分钟，具体取决于您的连接速度和其他因素。
- 接下来，将sfc/scannow粘贴到终端中，然后按Enter。
该命令将提示系统文件检查器(System File Checker)( SFC ) 工具“检查”丢失和损坏的系统文件，并用(SFC)DISM工具下载的副本替换它们（在步骤(Step)#2 中）。
- 系统扫描完成后，关闭命令提示符(Command Prompt)窗口并重新启动您的 PC，尤其是当Windows 资源保护(Windows Resource Protection)发现任何完整性违规时。
6.以安全模式重新启动PC
在安全模式下启动 Windows(Starting Windows in Safe Mode)是解决与您的 PC 软件和设备驱动程序相关的问题的有效故障排除解决方案。
- 按 Windows 键，在搜索栏中键入msconfig ，然后选择(msconfig)以管理员身份运行(Run as administrator)以打开系统配置应用程序(System Configuration app)。
- 前往Boot选项卡，选中Safe boot框，选择Apply，然后选择OK。
如果您可以在安全模式下(Safe Mode)使用触控板或外接鼠标左键单击，则问题可能是由有问题的应用程序或恶意软件引起的。在这种情况下，执行系统还原(Restore)（参见方法 #7）可能会解决左键单击不起作用的问题。但首先，从安全模式(Safe Mode)启动您的 PC 。
返回到System Configuration应用程序的Boot选项卡，取消选中Safe boot，选择Apply，选择OK。
选择重新启动(Restart)以正常启动您的 PC。
7.系统还原
将您的计算机恢复到左键单击可以正常工作而没有任何问题的地步。请注意，执行系统还原将删除创建还原点后对您的 PC 所做的所有应用程序、驱动程序和配置。这将删除恶意软件并修复影响您的 PC 左键单击的问题。
注意：(Note:)要将您的 PC 恢复到稳定点，您需要之前启用系统保护或手动创建还原点(enabled System Protection or manually created a Restore Point)。您还需要在恢复 PC 之前创建密码重设盘(create a password reset disk)，尤其是在您最近更改了 PC 密码的情况下。
- 在Windows 搜索(Windows Search)框中键入restore并选择(restore)Create a restore point。
- 转到系统保护(System Protection)选项卡并选择系统还原(System Restore)。
- Windows 将推荐最近的还原点，但您应该恢复到在 PC 的左键单击停止工作之前创建的较旧的还原点。选择选择不同的还原点，(Choose a different restore point)然后选择下一步(Next)。
- 选择适当的还原点，然后选择下一步(Next)继续。
您可以选择扫描受影响的程序(Scan for affected programs)以预览将在恢复过程中从您的 PC 中删除的应用程序、驱动程序和更新。
- 确认您的选择并选择完成(Finish)以恢复您的 PC。
恢复左键
如果这些故障排除技术都不能解决问题，请将您的 PC 操作系统更新到最新版本。转到设置(Settings)>更新和安全(Update & Security)> Windows 更新(Windows Update)并在页面上安装任何可用的Windows更新。
如果左键单击仍然不起作用，请查看有关修复 Windows 中的右键单击问题的教程(tutorial on fixing right-click problems in Windows)并尝试文章中列出的一些修复方法。如果所有故障排除解决方案均无效，请联系您的 PC 制造商或访问附近的维修中心。
Left-Click Not Working in Windows 10? Top 7 Ways to Fix
Left-click is the default command for selecting and highlighting items on a computer. If the left-click button on your mouse or trackpad doesn’t work aѕ designed, the problem could be a software оr hardware-related malfunctіon.
If you use an external mouse, the left-click might malfunction if foreign particles (dust, debris, dirt, etc.) are stuck in the mouse. Contact the mouse’s manufacturer, visit their website, or refer to the product’s instruction manual for cleaning instructions. But if left-click is not working on your PC’s touchpad and/or external mouse, try some of the fixes below.
You’ll need an input method/device to implement some of these troubleshooting solutions. For example, if your PC isn’t touch-enabled, test several external mice and check if anyone works on your PC. You could also use your keyboard to select items and navigate Windows if Mouse Keys is enabled on your PC.
1. Check Mouse Settings
If your mouse or touchpad left-click functions as the right-click, your PC probably recognizes the right-click as the primary mouse button. Head to the Windows Settings menu and switch back to the left button.
Go to Settings > Devices > Mouse and ensure the “Select your primary button” option is set to Left.
2. Use Tap-to-Click
A single click on your PC’s touchpad doubles as a left-click. If nothing happens when you click the surface of your touchpad, try configuring the touchpad to recognize taps instead.
Go to Settings > Devices > Touchpad, scroll to the “Taps” section, and check the Tap with a single finger to single-click box.
Restart the Windows Explorer in the Task Manager if your PC’s left-click is still not working correctly.
3. Restart the Windows Explorer
When certain system processes malfunction, restarting the Windows Explorer can help restore them to regular status.
- Right-click a blank space on the taskbar and select Task Manager.
Alternatively, launch the Task Manager from the Quick Access menu if your PC’s right-click button is also malfunctioning. Press the Windows key + X button and select Task Manager. Better yet, use the Ctrl + Shift + Esc keyboard shortcut to launch the Task Manager.
- Locate and select Windows Explorer in the “Windows Processes” section. Afterward, select the Restart button.
That’ll refresh your PC’s desktop, taskbar, and other system processes that rely on Windows Explorer. Press the left-click button and check if it now works.
4. Update, Roll Back or Uninstall Mouse Driver
A corrupt, outdated, or faulty mouse driver could be the reason why left-click is not working on your computer. Updating your mouse driver to the latest version will eliminate bugs and corruption. But if the left-click stopped working after installing a driver update, uninstall the update or remove the driver from your PC.
- Press the Windows key + X buttons and select Device Manager.
- Expand the Mice and other pointing devices category, right-click or long-press the mouse driver, and select Properties.
- Head to the Driver tab and select Update Driver to check your device, the internet, or Windows Updates downloads for new driver versions.
Select Search automatically for drivers on the next page and follow the prompt to update your mouse driver.
- Select Roll Back Driver (if available) to restore the driver to the previous version. You could also read our guide on rolling back a driver update in Windows for detailed instruction.
Uninstall and reinstall the mouse driver if the “Roll Back Driver” option is greyed out.
- Select Uninstall Device and select Uninstall on the confirmation prompt to remove the driver from your PC.
Restart your PC afterward. If the driver is pre-installed, Windows will automatically reinstall the driver when your PC comes back on.
If you’re using an external mouse, you might need to reinstall the device’s driver manually. Connecting the mouse to your computer should reinstall the device’s driver. You could also download and install the mouse driver from the manufacturer’s website.
5. Replace Missing or Corrupt System Files
Your PC’s left-click may stop working correctly if some crucial system files are missing or corrupt. We recommend running a system check and replacing any missing or corrupt files using the Windows Advanced System Cleanup tools—System File Checker (SFC) and Deployment Image Servicing and Management (DISM).
Connect your PC to the internet and follow these steps.
- Press Windows key + X and select Command Prompt (Admin) in the Quick Access Menu.
- Paste DISM /Online /Cleanup-Image /RestoreHealth in the Command Prompt terminal and press Enter.
Wait for the tool to scan your PC for corrupt system files. Then, go to the next step when you get a message that reads, “The restore operation completed successfully.” Or when the progress meter reaches 100%.
Note that this might take several minutes, depending on your connection speed and other factors.
- Next, paste sfc/scannow in the terminal and press Enter.
The command will prompt the System File Checker (SFC) tool to “check” for missing and corrupt system files, and replace them with the copies downloaded by the DISM tool (in Step #2).
- Close the Command Prompt window and restart your PC when the system scan is done, especially if the Windows Resource Protection found any integrity violations.
6. Restart PC in Safe Mode
Starting Windows in Safe Mode is an effective troubleshooting solution to problems relating to your PC’s software and device drivers.
- Press the Windows key, type msconfig in the search bar, and select Run as administrator to open the System Configuration app.
- Head to the Boot tab, check the Safe boot box, select Apply, and select OK.
If you can left-click using your trackpad or external mouse in Safe Mode, the issue is probably caused by a problematic app or malware. In that case, performing a System Restore (see method #7) might fix the problem with left-click not working. But first, boot your PC out of Safe Mode.
Return to the Boot tab of the System Configuration app, uncheck Safe boot, select Apply, select OK.
Select Restart to boot your PC normally.
7. System Restore
Revert your computer to a point where the left-click used to work correctly without any issues. Note that performing a system restore will remove all apps, drivers, and configurations made to your PC after the restore point was created. This will remove malware and fix issues affecting your PC’s left-click.
Note: To revert your PC to a stable point, you need to have previously enabled System Protection or manually created a Restore Point. You also need to create a password reset disk before restoring your PC, especially if you recently changed your PC’s password.
- Type restore in the Windows Search box and select Create a restore point.
- Go to the System Protection tab and select System Restore.
- Windows will recommend the most recent restore point but you should revert to an older restore point that was created before your PC’s left-click stopped working. Select Choose a different restore point and select Next.
- Select the appropriate restore point and select Next to proceed.
You can select Scan for affected programs to preview the apps, drivers, and updates that will be removed from your PC during the restoration process.
- Confirm your selection and select Finish to restore your PC.
Restore the Left-Click
Update your PC’s operating system to the latest version if none of these troubleshooting techniques fix the problem. Go to Settings > Update & Security > Windows Update and install any available Windows update on the page.
If the left-click still isn’t working, check out this tutorial on fixing right-click problems in Windows and try some fixes listed in the article. Contact your PC manufacturer or visit a nearby repair center if all troubleshooting solutions prove abortive.
