您发誓离开时关闭了 Windows 计算机，但当您再次坐在 PC 前时，它已开机。怎么可能？然后，有一天你发现计算机在没有任何人为干预的情况下被当场打开。
为什么会这样？你能阻止它吗？如果您的计算机似乎随机打开，那么这种怪异行为背后有多种可能性。
有东西碰到了键盘(Keyboard)或鼠标(Mouse)
当您的计算机处于睡眠模式时，它并没有真正关闭。大多数人可能都知道这一点，但是您是否知道只需使用鼠标和键盘就可以将计算机从睡眠中唤醒？
对于无法轻松访问其 PC 上的按钮的任何人来说，这是一个方便的功能，但它也可能导致不必要的开机行为。
如果您想阻止这种情况发生，请查看防止鼠标或 USB 设备将 Windows 从睡眠模式唤醒(Prevent a Mouse or USB Device from Waking Windows from Sleep Mode)，最后解决问题。
计划任务负责
Windows 10 具有强大的任务计划程序(task scheduler)，您可以使用它来自动执行各种任务，从而节省您的时间和精力。例如，您可以在每晚睡觉时安排备份。
任务计划程序(Task Scheduler)还可以在已进入睡眠状态的计算机上执行其作业。如果您不希望这种情况发生，您实际上可以轻松禁用唤醒计时器。
- 转到控制面板(Control Panel )>硬件和声音( Hardware and Sound )>电源(Power Options)选项( Power Options )>更改计划设置( Change Plan Settings.)下的电源选项。
- 接下来，选择更改高级电源设置。(Change advanced power settings.)
- 查找Sleep条目并选择其左侧的小加号(small plus sign)以展开它。
- 现在，展开允许唤醒计时器。(Allow wake timers. )
- 在On battery (if applicable) 和Plugged in下，根据需要更改设置。
现在您的计算机将仅在开机时执行计划任务。
网络唤醒了您的计算机
如果您的计算机通过以太网电缆(Ethernet cable)连接到互联网，它可能会通过称为“局域网(LAN)唤醒(Wake)”的功能启动。这可能会导致计算机自行开启。您通常可以在BIOS设置中关闭Wake on LAN 。但是，如果您对此不满意：
- 打开设备管理器(Device Manager)
- 选择网络适配器(Network Adapters)旁边的加号
- 选择相关的以太网(Ethernet)适配器，右键单击它并选择Properties。
- 在电源管理选项卡(Power Management tab)下，取消选中允许此设备唤醒计算机(Allow this device to wake the computer)。
- 选择确定(OK)。
如果您有多个网络适配器，您可能需要为每个网络适配器重复该过程。
断电(Itself)后您的计算机(Computer Turns)会自行启动(Power Outages)
当计算机断电时，它将保持关闭或自行重新启动。这是您可以设置的行为，通常作为计算机BIOS中的设置。如果您的计算机处于睡眠模式(Sleep Mode)并且断电，它可能会将其解释为需要在电源打开后立即重新启动的情况。
如果您生活在世界上经常出现电力供应短缺或电力供应大幅下降的地方，那么这可能就是导致计算机每次都打开的原因。因此，请参阅主板手册，了解如何设置断电后计算机的行为。
禁用自动重启
Windows具有称为自动重新启动(Restarting)的功能。与上面讨论的BIOS设置一样，这会告诉Windows在系统发生故障时该怎么做。如果该故障发生在计算机处于睡眠模式时，它可能解释了为什么您的计算机似乎在您离开时自行“打开”。
关闭此功能很容易：
- 打开控制面板(Control Panel)。
- 然后打开System and Security > System。
- 向下滚动并选择高级系统设置(Advanced system settings)。
- 转到高级选项卡(Advanced tab)。
- 在启动和恢复(Startup and Recovery)下，选择设置(Settings)。
- 在系统故障(System failure)下，取消选中自动重启(Automatically restart)。
- 选择确定(OK)。
现在，如果系统故障导致计算机关机，您的计算机应该保持关闭状态。
检查您的系统是否存在恶意软件
Rootkit、特洛伊木马(Trojans)和其他计算机恶意软件感染(malware infections)可能是各种奇怪计算机行为的背后原因。虽然您的计算机不太可能因为黑客的指示而自行开启，但使用高质量的反恶意软件对您的计算机进行彻底的扫描也不会有什么坏处。
硬件问题
虽然您的计算机可能会启动有很多复杂的原因，但有时它比这更简单。如果您有一台台式计算机，您可能需要打开它并仔细检查组件和电缆是否正确插入。任何地方都不应有磨损的接线或任何可见的损坏。
在您的计算机和墙壁插座之间安装电源浪涌保护器可能也是值得的，我们听说过不守规矩的电源导致计算机电源状态出现奇怪行为的故事，尽管还没有亲眼目睹。它不会受到伤害，因为无论哪种方式，电涌保护器都是一项不错的投资。
一些主板本身有备用电源和复位按钮。这些是为了使底盘安装之前的台架测试更容易。当您环顾计算机的内部并且它恰好有这样的按钮时，请确保没有任何东西可能压在它们上面
罕见和随机的原因
计算机可能会自动开机或从睡眠中唤醒的原因有很多，我们上面列出的那些是一些更常见的原因。但是，有时问题是由罕见的或只是简单的奇怪问题引起的。
例如，您的计算机上的电源按钮可能有问题。也许它多年来已经磨损，并且在不应该接触的时候进行接触。
您的计算机也可能一开始就没有关闭或进入睡眠状态。有时有错误的程序或硬件驱动程序导致中止并将计算机返回到桌面。在这种情况下，您应该确保您的驱动程序是最新的并坚持以确保您的计算机实际上正在完成您给它的关机命令。
也不排除世俗的原因。例如，当您不在时，动物或儿童正在打开计算机。
你有鬼
如果您的计算机一直自行打开的原因不是上面详述的任何常见问题，那么我们很遗憾地说它可能是鬼。遗憾的是，没有可以执行驱魔的软件包，但您可以尝试打电话给当地的捉鬼敢死队(Ghostbusters)，看看他们是否有任何建议。
说真的，拥有一台不可预测的计算机对任何人来说都不好玩，因此希望您的计算机现在可以保持关闭状态，直到您决定再次打开它。如果尽管您尽了最大的努力，您的神秘电源问题仍然存在，那么将其交给专业人士可能是您的下一个最佳步骤。
Does Your Computer Randomly Turn On By Itself?
You swear that yoυ turned off your Windows computer when you left, but whеn you sit down іn front of your PC again it’s powered on. How cаn that be? Then, one daу you catch the comрuter red-handed turning on without any human intervention.
Why is this happening? Can you stop it? If your computer seems to randomly turn on there are multiple possibilities behind this spooky behavior.
Something Touched the Keyboard or Mouse
When your computer is in sleep mode, it’s not really off. Most people probably know that, but did you know that you can wake your computer from sleep by just using a mouse and keyboard?
This is a handy feature for anyone who doesn’t have easy access to the buttons on their PC, but it can also result in unwanted power-on behavior.
If you want to stop this from happening, check out Prevent a Mouse or USB Device from Waking Windows from Sleep Mode and finally put the problem to rest.
A Scheduled Task Is Responsible
Windows 10 has a robust task scheduler which you can use to automate a variety of tasks to save you time and effort. For example, you can schedule a backup every night while you’re asleep.
Task Scheduler can also execute its jobs on a computer that’s been put to sleep. If you don’t want this to happen you can actually disable wake timers with ease.
- Go to Power Options under Control Panel > Hardware and Sound > Power Options > Change Plan Settings.
- Next, select Change advanced power settings.
- Look for the Sleep entry and select the small plus sign to its left to expand it.
- Now, expand Allow wake timers.
- Under On battery (if applicable) and Plugged in, change the settings as desired.
Now your computer will only execute scheduled tasks when powered on.
The Network Woke Your Computer
If your computer is connected to the internet via an Ethernet cable, it might be powered up thanks to a feature known as “Wake on LAN”. This can cause the computer to turn on by itself. You can usually switch Wake on LAN off in the BIOS settings. However, if you aren’t comfortable with that:
- Open Device Manager
- Select the plus sign next to Network Adapters
- Choose the relevant Ethernet adapter, right-click on it and select Properties.
- Under the Power Management tab, uncheck Allow this device to wake the computer.
- Select OK.
If you have multiple network adapters you may need to repeat the process for each one.
Your Computer Turns On By Itself After Power Outages
When a computer loses power it will either stay off or reboot itself. This is behavior which you can set, usually as a setting in the computer BIOS. If your computer is in Sleep Mode and the power goes out, it might interpret that as a situation where it needs to boot up again as soon as the power comes on.
If you live in a part of the world where there tend to be short cuts in power or big dips in the electricity supply, then that might be what’s causing the computer to turn on each time. So consult your motherboard’s manual on how to set the computer’s behavior after a power loss.
Disable Automatic Restarts
Windows has a feature known as Automatic Restarting. Like the BIOS setting discussed above, this tells Windows what to do in the event of a system failure. If that failure happens while the computer is in sleep mode, it might explain why your computer seems to have “turned on” by itself while you were away.
Turning this feature off is easy:
- Open the Control Panel.
- Then open System and Security > System.
- Scroll down and select Advanced system settings.
- Go to the Advanced tab.
- Under Startup and Recovery, select Settings.
- Under System failure, uncheck Automatically restart.
- Select OK.
Now your computer should stay off should a system failure cause it to power down.
Check Your System for Malware
Rootkits, Trojans and other computer malware infections could be behind all sorts of weird computer behavior. While it’s not super-likely that your computer is turning itself on because a hacker is telling it to, it can’t hurt to do a nice thorough scan of your computer using high-quality anti-malware software.
Hardware Issues
While there are plenty of sophisticated reasons your computer may be booting up sometimes it’s something more simple than that. If you have a desktop computer, you might want to open it up and double check that very component and cable is properly inserted. There should be no frayed wiring or any visible damage anywhere.
It may be worth having a power surge protector between your computer and the wall outlet as well, we’ve heard stories of unruly mains power causing strange behavior with computer power states, although haven’t seen them first hand. It can’t hurt, since a surge protector is a good investment either way.
Some motherboards have backup power and reset buttons on the motherboard itself. These are there to make bench-testing before chassis installation easier. While you’re looking around the guts of your computer and it happens to have such buttons, make sure nothing could potentially be pressing against them
Rare and Random Causes
There are many reasons why a computer might turn itself on or wake from sleep and the ones we’ve listed above are some of the more common ones. However, sometimes the issue is caused by rare or just plain weird issues.
For example, it’s possible that there’s something wrong with the power button on your computer. Perhaps it’s worn down over the years and is making contact when it shouldn’t.
It’s also possible that your computer isn’t shutting down or going to sleep in the first place. Sometimes there’s an errant program or hardware driver that causes an abort and returns the computer back to the desktop. In which case you should make sure your drivers are up to date and stick around to make sure your computer is actually completing the shutdown command you’ve given it.
Don’t rule out mundane causes either. Perhaps an animal or a child is switching the computer on while you’re away, as one example.
You Have Ghosts
If the reason your computer keeps turning on by itself isn’t any of the common issues detailed above, then we’re sorry to say that it’s probably ghosts. Sadly there are no software packages that can perform an exorcism, but you can try phoning your local Ghostbusters to see if they have any advice.
In all seriousness, having an unpredictable computer isn’t fun for anyone, so hopefully your computer will now stay off until you decide to turn it on again. If your mysterious power problems persist despite your best efforts, taking it to a professional may be your next best step.
