在我插入USB 设备(USB device)并在未弹出的情况下将其移除后，我台式计算机(desktop computer)上的一个USB端口停止工作。我已经做了一百万次了，但看起来我的运气终于用完了。该端口在设备管理器(Device Manager)中似乎很好，因为没有错误或警告图标。
所以在网上看了一些之后，我看到了一篇微软的文章(Microsoft article)，告诉我应该继续卸载设备管理器(Device Manager)中USB 串行总线控制器(USB Serial Bus Controllers)下的USB 主机控制器( USB Host Controllers)。之后，您只需重新启动计算机，Windows(computer and Windows)应该会再次找到硬件并安装它。嗯(Well)，不完全是。我以前做过这个，通常它工作得很好，但是这次我的运气再次失败了，而不是让那个死掉的USB 端口(USB port)再次工作，我所有的USB 端口(USB port)都死了！
真正有趣的是，连接的USB 鼠标和键盘(USB mouse and keyboard)在BIOS中运行良好，甚至当我在我的双启动系统上加载不同的(boot system)操作系统(operating system)时它也能正常工作，但是当Windows 7启动时，它会切断 USB 的所有电源(USB)设备。
现在我读到的每一篇帮助文章(help article)都说点击这个或卸载这个驱动程序或下载 XYZ(driver or download XYZ)完全没用，因为我没有输入设备(input device)来点击任何东西！大约一个小时后，我开始担心我实际上必须重新安装操作系统，但幸运的是，我尝试的最后一个解决方案终于奏效了。死掉的USB 端口(USB port)仍然死了，但这是另一天的另一个帖子。在本文中，我将介绍在您当前没有鼠标或键盘访问权限(mouse or keyboard access)的情况下可以采取的不同步骤来尝试重新获得对系统的访问权限。
方法 1 – 尝试 PS2 端口
我在搜索此问题时阅读的第一篇文章提到连接PS2 键盘和鼠标(PS2 keyboard and mouse)然后获取访问权限。我已经想到了，但我的电脑比较新，因此只有USB端口！如果您有幸仍然拥有PS2端口，那么您只需要找到旧的键盘和鼠标(keyboard and mouse)来获取回访权限。如果您像我一样只有USB端口，请继续阅读！
方法 2 – 检查 BIOS
下一步是检查BIOS并查看是否以某种方式禁用了USB 。如果您在预启动环境中仍然可以使用USB 设备(USB device)，那么您几乎可以确定它没有被禁用。如果它仅在Windows开始加载时死掉，那么它可能已启用。
小心不要将设置更改为USB Disabled！如果你这样做，那么在BIOS中你甚至不能使用你的USB 键盘(USB keyboard)，你真的会遇到麻烦。在BIOS中禁用USB后启用(USB)USB 键盘(USB keyboard)的唯一方法是使用PS2 鼠标(PS2 mouse)或从主板上取下CMOS 电池(CMOS battery)！除非你想拆开你的电脑，否则如果你没有任何PS2端口，绝对不要禁用USB 。如果启用了USB，它可能会启用，然后继续下一个方法。
方法 3 – 系统还原
这种方法最终对我有用。我真的很幸运，因为我前一天刚刚安装了一个程序，Windows自动为我创建了一个还原点(restore point)。希望(Hopefully)您没有在您的系统上禁用系统还原，因为如果您这样做了，您将不得不采取更严厉的措施来让您的键盘和鼠标(keyboard and mouse)再次工作。
为此，您需要在Windows即将加载时按F8键。看到计算机制造商(computer manufacturer)的徽标后，您应该开始按住 F8。如果您有双启动系统(boot system)或多磁盘系统，您必须选择要从哪个驱动器启动，请继续从列表中选择该操作系统或磁盘(OS or disk)，然后在您按下Enter后，按住F8关键(F8 key)。这应该让您进入Windows 7高级启动选项(Advanced Boot Options)对话框。
您将继续选择Repair Your Computer。我也尝试登录到安全模式(Safe Mode)，但键盘和鼠标(keyboard and mouse)仍然拒绝工作，所以这是一个死胡同。现在您将看到系统恢复(system recovery)选项列表。
单击(Click)系统还原(System Restore)，您将看到熟悉的对话框(dialog box)，您可以在其中选择 还原点(restore point)。您显然想选择一个在您的问题发生之前创建的。默认情况下，它会为您选择一个，但您可以根据需要选择其他一个。
恢复后，您应该可以再次使用键盘和鼠标(keyboard and mouse)了。如果您没有创建还原点(restore point)，那么您很不走运。不幸的是，在这一点上，除了PS2(PS2)端口和系统还原(system restore)之外，我还没有找到任何其他有保证的解决方案。我在下面列出了一些最后的冰雹选择。
方法 4 – CMOS 电池
这可能无济于事，因为问题与Windows有关，但您可以试一试。值得庆幸的是，移除CMOS 芯片(CMOS chip)并不是那么糟糕。您只需打开机箱并找到主板上的小圆形电池，通常很容易看到。
方法 5 – 修复安装 Windows 7
如果您没有还原点(restore point)，那么最后的选择(resort option)是执行修复安装(repair install)。这将用原始驱动程序替换鼠标和键盘驱动程序(mouse and keyboard drivers)，您应该再次工作。修复安装(repair install)只会重新安装Windows 操作系统(Windows OS)，但不会删除您的数据。
这个过程相当长，需要一些时间，但总比重新安装Windows(Windows altogether)要好。SevenForums有一个很棒的教程，可以引导您完成整个过程并解释所有注意事项等。
方法 6 – 刷新 Windows 8
如果您使用的是Windows 8，您可能会有更多的运气。您可以尝试刷新 PC，这是Windows 8中的新选项。阅读我之前关于如何在 Windows 8 上执行刷新的文章(perform a refresh on Windows 8)。为此，您首先需要进入Windows 8 系统恢复(System Recovery) 选项(Options)对话框。
您还可以阅读由EightForums创建的(EightForums)Windows 8修复安装指南，该网站与SevenForums相同，仅适用于Windows 8内容。同样(Again)，您不会丢失任何数据，但您应该再次拥有可以正常工作的鼠标和键盘(working mouse and keyboard)。
希望您可以使用上述方法之一重新访问您的计算机！如果没有，请在此处发表评论，说明您尝试了什么、卡在哪里等，我们会尽力提供帮助。享受！
Troubleshoot Keyboard and Mouse Not Working in Windows
Оne of the USB ports on my desktop computer stоpрed working after I had pluggеd in a USB device and removed it without ejecting. I’ve dоne it a million times, but it looked like my lυсk finally ran out. The port seemed fine in Deνice Manager because there were no error оr warning icons.
So after doing a bit of reading online, I came across a Microsoft article that told me I should go ahead and uninstall the USB Host Controllers under USB Serial Bus Controllers in Device Manager. After that, you just have to restart your computer and Windows should find the hardware again and install it. Well, not exactly. I’ve done this before and normally it works just fine, but this time around my luck failed again and instead of having that one dead USB port working again, all of my USB ports were dead!
What was really funny was that the connected USB mouse and keyboard worked fine in the BIOS and it even worked when I loaded a different operating system on my dual boot system, but the instant Windows 7 started up, it would kill all power to the USB devices.
Now every help article I was reading that said click on this or uninstall this driver or download XYZ was completely useless because I had no input device to click on anything! After about an hour I started getting nervous that I would actually have to reinstall the OS, but thankfully the last solution I tried finally worked. The dead USB port is still dead, but that’s another post for another day. In this article, I’m going to go through the different steps you can take to try to regain access to your system if you currently have no mouse or keyboard access.
Method 1 – Try PS2 Ports
The first article I read when searching for this problem mentioned attaching a PS2 keyboard and mouse and then getting access. I had already thought of that, but my computer is newer and therefore only has USB ports! If you’re lucky enough to still have PS2 ports, then you just need to find an older keyboard and mouse to use to gain back access. If you’re like me and only have USB ports, then read on!
Method 2 – Check the BIOS
The next step is to check the BIOS and see if somehow USB was disabled. You can pretty much be sure it’s not disabled if you can still use your USB device while in the pre-boot environment. If it only dies when Windows starts to load, then it’s probably enabled.
Be very careful not to change the settings to USB Disabled! If you do that, then you won’t even be able to use your USB keyboard while in the BIOS and you’ll really be in trouble. The only way to enable a USB keyboard after your disabled USB in the BIOS is to either use a PS2 mouse or remove the CMOS battery off the motherboard! Unless you want to be taking apart your computer, definitely don’t disable USB if you don’t have any PS2 ports. If USB is enabled, which it probably will be, then move on to the next method.
Method 3 – System Restore
This method is the one that finally worked for me. I was really lucky because I had just installed a program the day before and Windows created a restore point for me automatically. Hopefully, you didn’t disable system restore on your system because if you did, you’re going to have to take more drastic measures to get your keyboard and mouse working again.
To do this, you need to press the F8 key right when Windows is about to load. Once you see the logo for the computer manufacturer, you should start holding down F8. If you have a dual boot system or a multi-disk system where you have to choose which drive you want to boot from, go ahead and select that OS or disk from the list and the instant after you press Enter, press and hold the F8 key. That should get you into the Windows 7 Advanced Boot Options dialog.
You’re going to go ahead and choose Repair Your Computer. I tried logging into Safe Mode also, but the keyboard and mouse still refused to work, so that was a dead end. Now you’ll see a list of system recovery options.
Click on System Restore and you’ll get the familiar dialog box where you can select a restore point. You obviously want to pick one that was created before your problem occurred. By default, it will pick one for you, but you can choose a different one if you like.
Once you restore, you should be good to go and have access to your keyboard and mouse again. If you didn’t have a restore point created, then you are pretty much out of luck. Unfortunately, at this point, I haven’t been able to find any other guaranteed solutions outside of PS2 ports and system restore. There are some last resort hail-mary options I’ve listed below.
Method 4 – CMOS Battery
This probably won’t help because the problem is related to Windows, but you can give it a shot. Thankfully removing the CMOS chip is not all that bad. You just have to open your case and find the little round battery on the motherboard, which is usually easily visible.
Method 5 – Repair Install Windows 7
If you don’t have a restore point, then the last resort option is to perform a repair install. This will replace the mouse and keyboard drivers with the original ones and you should be working again. A repair install will simply re-install the Windows OS, but will not delete your data.
The process is fairly long and it will take some time, but it’s better than having to re-install Windows altogether. SevenForums has an awesome tutorial that walks you through the whole process and explains all the caveats, etc.
Method 6 – Refresh Windows 8
If you’re using Windows 8, you might have a bit more luck. You can try to Refresh the PC, which is a new option in Windows 8. Read my previous post on how to perform a refresh on Windows 8. In order to do that, you’ll first need to get into the Windows 8 System Recovery Options dialog.
You can also read the repair install guide for Windows 8 created by EightForums, the same site as SevenForums, just for Windows 8 stuff. Again, you don’t lose any data, but you should have a working mouse and keyboard again.
Hopefully, you can get access back to your computer using one of the methods above! If not, post a comment here about what you tried, where you got stuck, etc and we’ll try to help. Enjoy!
