Walter GlennFormer Editorial Director

Walter Glenn is a former Editorial Director for How-To Geek & its sister sites. He has more than 30 years of experience in the computer industry và over đôi mươi years as a technical writer và editor. He"s written hundreds of articles for How-To Geek & edited thousands. He"s authored or co-authored over 30 computer-related books in more than a dozen languages for publishers lượt thích Microsoft Press, O"Reilly, and Osborne/McGraw-Hill. He"s also written hundreds of Trắng papers, articles, user manuals, and courseware over the years. Read more...

Bạn đang xem: System interrupts là gì

About How-To Geek
Jul 18, 2017, 1:04 pm EDT| 5 min read

If you ever browse through your Task Manager window, you’ve likely spotted a process named “System interrupts” và then probably ignored it. But if it’s using up your CPU và you’re wondering what you can vị about it, we’ve got the answer for you.

RELATED: What Is This Process và Why Is It Running on My PC?

This article is part of our ongoing series explaining various processes found in Task Manager, like Runtime Broker, svchost.exe pháo, dwm.exe pháo, ctfmon.exe pháo, rundll32.exe, Adobe_Updater.exe cộ, and many others. Don’t know what those services are? Better start reading!

What Is the “System Interrupts” Process?

System Interrupts is an official part of Windows &, while it does appear as a process in Task Manager, it’s not really a process in the traditional sense. Rather, it’s an aggregate placeholder used to display the system resources used by all the hardware interrupts happening on your PC.


While a hardware interrupt sounds rude, it’s a normal communication between your hardware (& associated software) & your CPU. Say you start typing something on your keyboard, for example. Rather than have sầu a whole process dedicated just to watching for signals from your keyboard, there’s actually a bit of hardware on your motherboard that handles that kind of monitoring. When it determines that another piece of hardware needs the CPU’s attention, it sends an interrupt signal to the CPU. If it’s a high priority interrupt (as is usually the case with user input), the CPU suspends whatever process it’s working on, đơn hàng with the interrupt, & then resumes its previous process.

It all happens lightning fast, và there are typically many, many interrupts going on all the time. In fact, you can see this very thing in action if you lượt thích. Fire up Task Manager và scroll down until you see “System interrupts” in the window. Now, open up Notepad và start typing. It won’t affect your “System interrupt” setting dramatically, but you should see it rise by a tenth of a percentage point or so. In our case, it rose from a baseline of 0.1% to lớn 0.3%.



During the course of normal operations, you might see the CPU usage of “System interrupts” rise as high as 10% briefly before it settles back down to lớn next to lớn nothing.

That’s Great, But Why Is It Using So Much CPU?

If you’re seeing the CPU usage of “System interrupts” rise higher than about 20% and–this is the important part–stay there consistently, then you have sầu a problem. Since it’s representative sầu of hardware interrupts on your PC, a consistently high CPU usage typically means that a piece of hardware or its associated driver is misbehaving. So, how bởi vì you troubleshoot the hardware problem? Well, that’s the tricky part.


Your first step should be restarting your computer. We know you’ve sầu heard this a million times, but it’s still solid advice. Restarting your computer can fix all kinds of weird issues & it’s an easy enough step to lớn take.

If restarting your computer doesn’t cure the CPU usage problem, the next step is to lớn make sure that your computer is up lớn date. Let Windows Update vị its thing so you can be sure you have all the lakiểm tra Windows and driver updates–at least for drivers Windows is managing. While you’re at it, you’ll need to make sure drivers that Windows Update doesn’t manage are also up to date. You can find instructions for doing both of these things in this guide.

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RELATED: Why Does Rebooting a Computer Fix So Many Problems?

If updating your PC and hardware drivers doesn’t vì the trichồng, then you’re going lớn have sầu dive in & figure out what specific piece of hardware is causing trouble. Diagnosing all your hardware is a bit beyond the scope of this article, but we vì have sầu some helpful guidelines for helping you narrow things down.

Start by disabling your external devices one at a time. We start with external devices mainly because it’s the easiest thing to lớn do and you should mainly focus on external drives & input devices lượt thích your keyboard, mouse, webcam, and microphone. Just unplug them one at a time & see if “System interrupts” settles down. If it does, then you know what device lớn focus on.

Next, move sầu khổng lồ your internal devices. Obviously, this gets a bit trickier since you can’t just unplug them. But you can disable them in Device Manager. You just want to lớn be careful not khổng lồ disable any devices critical lớn keeping your system running, lượt thích disk drives or display adapters. Also, don’t disable anything listed under the Computer, Processors, or System Device categories. Instead, focus on things lượt thích network adapters, sound cards, và other add-on cards. They are the most likely culprits. Just go one at a time. Disable the device và check out “System interrupts” in Task Manager. If the problem goes away, you’ve sầu identified the problem device. If it doesn’t, re-enable the device and move sầu on lớn the next one.

There are a couple of other pieces of hardware that can cause this problem and that you won’t be able to lớn demo this way. A failing power supply (or laptop battery) can cause a spike in the CPU use of “System interrupts” and so can a failing hard drive. You can chạy thử your hard drives with Windows’ built in Cheông chồng Disk tool or with a good third-buổi tiệc ngọt S.M.A.R.T. utility. Unfortunately, the only way to lớn kiểm tra a power supply for this trouble is to lớn replace it.

RELATED: How to Fix Hard Drive Problems with Chkdsk in Windows 7, 8, and 10

If you bởi identify a device that’s causing trouble, your next step is figuring out whether it’s the device itself or the hardware driver that’s causing the problem. Again, this can be a bit tricky to lớn figure out và will require some trial và error, but we have some guidelines.

Try external devices on another computer if you have one available.Hit up Google or your hardware manufacturer’s website site & see if other people are having similar trouble.

RELATED: Roll Back Troublesome Device Drivers in Windows Vista

Can I Disable It?

No, you can’t disable “System interrupts.” And there’s no good reason to lớn. It’s a vital component for your PC’s performance since it’s used khổng lồ handle & report on hardware interrupts. Windows won’t even let you temporarily kết thúc the task.

Could This Process Be a Virus?

“System interrupts” itself is an official Windows component. It is almost certainly not a vi khuẩn. In fact, since it’s not an actual process, “System interrupts” doesn’t even have an associated .EXE or .DLL tệp tin that runs. This means there’s no way for it lớn be hijacked by malware directly.

Still, it is possible that a virut is interfering with a particular hardware driver, which in turn could have sầu an impact on “System interrupts.” If you suspect any size of malware, go ahead và scan for viruses using your preferred virus scanner. Better safe than sorry!

Walter GlennWalter Glenn is a former Editorial Director for How-To Geek và its sister sites. He has more than 30 years of experience in the computer industry và over trăng tròn years as a technical writer and editor. He"s written hundreds of articles for How-To Geek and edited thousands. He"s authored or co-authored over 30 computer-related books in more than a dozen languages for publishers like Microsoft Press, O"Reilly, và Osborne/McGraw-Hill. He"s also written hundreds of white papers, articles, user manuals, và courseware over the years. Read Full Bio »
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