SYSTEM INTERRUPTS LÀ GÌ

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Walter GlennFormer Editorial Director

Walter 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 & over 20 years as a technical writer & 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, & Osborne/McGraw-Hill. He"s also written hundreds of white papers, articles, user manuals, and courseware over the years. Read more...

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wjglenn
Jul 18, 2017, 1:04 pm EDT| 5 min read
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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 vì about it, we’ve sầu got the answer for you.

RELATED: What Is This Process & 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 cộ, dwm.exe pháo, ctfmon.exe cộ, rundll32.exe pháo, 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 lớn display the system resources used by all the hardware interrupts happening on your PC.

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While a hardware interrupt sounds rude, it’s a normal communication between your hardware (& associated software) and your CPU. Say you start typing something on your keyboard, for example. Rather than have a whole process dedicated just lớn 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 lớn 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, giao dịch with the interrupt, & then resumes its previous process.

It all happens lightning fast, & 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 and scroll down until you see “System interrupts” in the window. Now, open up Notepad & 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% lớn 0.3%.

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During the course of normal operations, you might see the CPU usage of “System interrupts” rise as high as 10% briefly before it settles baông chồng 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 a problem. Since it’s representative 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 vì you troubleshoot the hardware problem? Well, that’s the tricky part.

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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 khổng lồ take.

If restarting your computer doesn’t cure the CPU usage problem, the next step is khổng lồ make sure that your computer is up to date. Let Windows Update vì chưng its thing so you can be sure you have sầu all the lakiểm tra Windows và 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 khổng lồ 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 chưng the trichồng, then you’re going to have sầu dive sầu in và 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 do have 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 lớn vì & you should mainly focus on external drives và input devices like your keyboard, mouse, webcam, and microphone. Just unplug them one at a time và see if “System interrupts” settles down. If it does, then you know what device khổng lồ focus on.


Next, move to lớn 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 lớn be careful not lớn disable any devices critical lớn keeping your system running, like 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, & other add-on cards. They are the most likely culprits. Just go one at a time. Disable the device & kiểm tra out “System interrupts” in Task Manager. If the problem goes away, you’ve identified the problem device. If it doesn’t, re-enable the device và move sầu on khổng lồ the next one.

There are a couple of other pieces of hardware that can cause this problem và 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” và so can a failing hard drive. You can test your hard drives with Windows’ built in Cheông xã Disk tool or with a good third-buổi tiệc nhỏ S.M.A.R.T. utility. Unfortunately, the only way lớn kiểm tra a power supply for this trouble is khổng lồ replace it.

RELATED: How to lớn 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 and 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 web site và 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 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.

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Could This Process Be a Virus?

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

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


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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 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 like Microsoft Press, O"Reilly, and Osborne/McGraw-Hill. He"s also written hundreds of trắng papers, articles, user manuals, và courseware over the years. Read Full Bio »