中央处理器^{(Central Processing Unit)}( CPU ) 是任何计算设备的核心，负责执行您给它的任何指令。当这些资源紧张时，应用程序可能会滞后或关闭，光标可能会缓慢移动，或者计算机可能会开始发热。

幸运的是，有一些快速方法可以确定您的CPU是否过度工作并降低Windows 10上的^{(Windows 10)}CPU使用率。

如何在 Windows 10 上检查 CPU 使用率^{(How to Check CPU Usage on Windows 10)}

在我们了解如何降低CPU使用率的提示之前，最好先了解一下是哪些程序或进程导致了CPU使用率过高。这样您就不必浪费时间尝试与您的问题无关的解决方案。

请按照以下步骤检查CPU使用率：

打开 Windows 任务管理器 ( Ctrl + Alt + Delete ) 并单击任务管理器^{(Task Manager)}或按住键盘上的Ctrl + Shift + ESC。

确定“进程^{(Processes )}”和“性能”^{( Performance )}选项卡，让您更仔细地了解可能导致CPU使用率高的原因。选择列顶部以按CPU使用率排序。

确定占用计算机 RAM^{(computer’s RAM)}和电源的服务^{(Services )}和系统进程^{( System Processes)}，例如wsappx、dwm.exe、ntoskrnl.exe或csrss.exe 。
要尝试立即解决问题，您可以尝试通过右键单击该过程并选择End Task来结束该过程。

仅当您看到CPU使用率超过 50% 超过 10 分钟时才应该结束任务。有时 Windows 会在后台执行扫描或更新，这会在短时间内导致CPU使用率过高。^(CPU)

此外，结束任务只是一个短期的解决方案，并不能真正解决问题。阅读以下修复以获取有关永久解决此问题的提示。

如何降低 Windows 10 上的 CPU 使用率^{(How to Lower CPU Usage on Windows 10)}

使用以下解决方案在Windows 10上进行诊断、故障排除和降低^{(Windows 10)}CPU使用率。

快速修复^{(Quick Fixes)}

尝试以下快速修复以降低Windows 10 PC 上的 CPU使用率。^(CPU)

保存您的工作并重新启动计算机以清除临时文件，并可能解决长时间运行进程的减速问题。
^{(Close any background processes)}通过在任务管理器的启动^(Startup)选项卡下取消选中可能正在运行的任何后台进程来关闭它们。按启动影响^{(Startup impact)}排序，以查看哪些程序最占用资源。重新启动计算机以防止它们自动重新启动。

更新您的驱动程序^{(Update your drivers)}以消除任何错误或兼容性问题。选择开始^{(Start )}>设置^{(Settings )}>更新和安全^{(Updates & Security)}>检查更新^{(Check for Updates)}以更新关键驱动程序。
如果不确定您的 PC 上使用的版本，请查看我们的BIOS 版本指南并^{(BIOS version)}更新您的 BIOS^{(update your BIOS)}，这可能会解决CPU使用问题。

扫描您的硬盘驱动器以查找会增加 CPU 使用率的潜在病毒或恶意软件威胁^{(potential virus or malware threats)}。
暂时禁用第三方杀毒软件^{(third-party antivirus software)}、第三方防火墙软件^{(third-party firewall software)}或第三方VPN软件^{(third-party VPN software)}，看看是否有助于降低CPU使用率。
检查WMI 提供程序主机 (WmiPrvSE.exe)^{(WMI Provider Host (WmiPrvSE.exe))}进程的任务管理器。如果其CPU使用率几乎达到 100%，请关闭该进程并重新打开它。如果其他程序导致CPU使用率过高，请继续阻止它启动或卸载它。
运行系统文件检查器^{(System File Checker)}扫描以修复系统中任何损坏的文件。

安装最新的 Windows 10 版本^{(latest Windows 10 version)}以及最新的更新。您还可以暂时禁用系统上 Windows 更新的自动下载^{(disable automatic download of Windows Updates)}。

启动到安全模式^{(Boot into Safe Mode)}并检查高CPU使用率是否仍然存在。如果不是，那么高CPU使用率可能是由第三方软件引起的。您可以按照我们的指南执行干净启动^{(perform a clean boot)}，这将帮助您确定导致CPU使用率高的确切程序或进程。

如果Cortana是导致CPU使用率高的程序之一，请禁用 Cortana^{(disable Cortana)}并检查它是否有帮助。
为您的计算机添加更多 RAM^{(Add more RAM)}以减轻处理器的压力。
检查你的电源。如果电源出现故障，它可能会开始降低CPU电压以保持电力。因此，CPU无法满负荷运行。

检查您的电源选项^{(Check Your Power Options)}

某些电源设置可能会限制计算机的CPU速度并影响计算机的性能。值得尝试平衡^(Balanced)和高性能^{(High Performance)}电源计划，看看哪一个可以降低高CPU使用率。下面，我们将向您展示如何启用高性能^{(Performance)}模式，但如果您已经在使用该模式，请切换到Balanced。

在搜索框中键入Edit Power Plan并选择^{(Edit Power Plan )}Open。

在地址栏中选择电源选项。^{(Power Options)}

选择创建电源计划^{(Create a power plan)}。

启用非省电计划^{(non-power saving plan)}。

按Ctrl + Alt + Delete打开任务管理器^{(Task Manager)}并检查您的CPU使用率是否恢复正常。

禁用 Superfetch^{(Disable Superfetch)}

Superfetch ( Sysmain ) 是^(Sysmain)Windows 10中的一项资源密集型功能，它通过在启动常用应用程序之前将它们预加载到RAM中来提高系统性能。^(RAM)您可以按照以下步骤禁用它，看看这是否会降低CPU使用率。

如果您在禁用该服务后没有看到CPU使用率下降，请继续并重新启用它，因为我们不建议将其保持禁用状态。

右键单击开始^(Start)>运行^(Run)。
在“运行”^(Run)对话框中键入services.msc ，然后按^{(services.msc)}Enter。

在“服务^(Services)”窗口中向下滚动到Sysmain，右键单击它并选择“属性^(Properties)” 。

选择启动类型^{(Startup type)}旁边的下拉菜单，然后选择禁用^(Disabled)。

选择Apply，重新启动您的 PC 并检查这是否会降低CPU使用率。

给我们留言，让我们知道本指南是否有助于降低Windows 10 PC 上的CPU使用率。^(CPU)

How to Lower CPU Usage on Windows 10

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Fortunately, there are quick ways to identify if your CPU is overworked and lower CPU usage on Windows 10.

How to Check CPU Usage on Windows 10

Before we get into tips on how to lower your CPU usage, it’s a good idea to see what programs or processes are causing the high CPU usage. This way you don’t have to waste time trying solutions that aren’t relevant to your problem.

Follow the steps below to check CPU usage:

Open the Windows Task Manager (Ctrl + Alt + Delete) and click on Task Manager or by pressing and holding Ctrl + Shift + ESC on your keyboard.

Identify the Processes and Performance tabs, which give you a closer look at what may be contributing to the high CPU usage. Select the top of the column to sort by CPU usage.

Identify the Services and System Processes such as wsappx, dwm.exe, ntoskrnl.exe or csrss.exe that are hogging your computer’s RAM and power.
To try and immediately resolve the issue, you can try to end the process by right-clicking on it and choosing End Task.

You should only end the task if you see the CPU usage over 50% for more than 10 minutes. Sometimes Windows performs scans or updates in the background that will cause high CPU usage for a short period of time.

Also, ending the task is just a short term solution and doesn’t actually solve the problem. Read the fixes below for tips on permanently solving this issue.

How to Lower CPU Usage on Windows 10

Use the solutions below to diagnose, troubleshoot and lower CPU usage on Windows 10.

Quick Fixes

Try the following quick fixes to lower CPU usage on your Windows 10 PC.

Save your work and restart your computer to clear out temporary files and possibly resolve slowdown in long-running processes.
Close any background processes that may be running by unchecking them under the Startup tab in Task Manager. Sort by Startup impact to see which programs are the most resource intensive. Restart your computer to prevent them from restarting automatically.

Update your drivers to eliminate any bugs or compatibility issues. Select Start > Settings > Updates & Security > Check for Updates to update critical drivers.
Check out our guide on BIOS version if unsure of the version being used on your PC and update your BIOS, which may fix the CPU usage issue.

Scan your hard drive for potential virus or malware threats that increase CPU usage.
Disable third-party antivirus software, third-party firewall software, or third-party VPN software temporarily and see if it helps lower CPU usage.
Check the Task Manager for the WMI Provider Host (WmiPrvSE.exe) process. If its CPU usage is almost at 100 percent, turn off the process and turn it back on again. If a different program is causing the high CPU usage, go ahead and prevent it from starting up or uninstall it.
Run a System File Checker scan to fix any corrupted files in your system.

Install the latest Windows 10 version along with the latest updates. You can also temporarily disable automatic download of Windows Updates on your system.

Boot into Safe Mode and check if the high CPU usage still occurs. If not, then the high CPU usage may be caused by third-party software. You can follow our guide to perform a clean boot, which will help you identify the exact program or process causing the high CPU usage.

If Cortana is one of the programs causing high CPU usage, disable Cortana and check if it helps.
Add more RAM to your computer to take some of the stress off of your processor.
Check your power supply. If the supply is faulty, it can start undervolting your CPU to preserve power. Consequently, the CPU fails to function at full capacity.

Check Your Power Options

Some power settings may throttle your computer’s CPU speed and affect your machine’s performance. It’s worth trying out both Balanced and High Performance power plans to see which one reduces high CPU usage. Below, we show you how to enable High Performance mode, but if you’re already using that, switch to Balanced.

Type Edit Power Plan in the search box and select Open.

Select Power Options in the address bar.

Select Create a power plan.

Enable a non-power saving plan.

Press Ctrl + Alt + Delete to open Task Manager and check if your CPU usage is back to normal.

Disable Superfetch

Superfetch (Sysmain) is a resource-intensive feature in Windows 10 that increases the system’s performance by preloading your frequently used apps into RAM before you launch them. You can disable it by following the steps below to see if that reduces the CPU usage.

If you don’t see any drop in CPU usage after disabling the service, go ahead and re-enable it as we don’t recommend keeping it disabled.

Right-click Start > Run.
Type services.msc in the Run dialog box and then press Enter.

Scroll down to Sysmain in the Services window, right-click on it and select Properties.

Select the drop-down menu next to Startup type and then select Disabled.

Select Apply, restart your PC and check if this lowers the CPU usage.

Leave us a comment and let us know if this guide helped you lower CPU usage on your Windows 10 PC.

平任

About the author

我是一位强烈推荐的 Windows 10 专家，我专注于帮助人们个性化他们的计算机外观并使他们的 Office 工具更加用户友好。我利用自己的技能帮助他人找到使用 Microsoft Office 的最有效方法，包括如何格式化文本和图形以进行在线打印、如何为 Outlook 创建自定义主题，甚至如何自定义桌面任务栏的外观计算机。

如何降低 Windows 10 上的 CPU 使用率

如何在 Windows 10 上检查 CPU 使用率^{(How to Check CPU Usage on Windows 10)}