Fix svchost

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Walter GlennFormer Editorial Director

Walter Glenn is a former Editorial Director for How-To Geek and its sister sites. He has more than 30 years of experience in the computer industry và over 20 years as a technical writer and editor. He"s written hundreds of articles for How-To Geek và 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 more...

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UpdatedJul 3, 2017, 12:37 pm EST| 4 min read
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If you’ve ever browsed through Task Manager, you may have wondered why there are so many Service Host processes running. You can’t kill them, và you sure didn’t start them. So, what are they?

The Service Host process serves as a shell for loading services from DLL files. Services are organized into related groups and each group is run inside a different instance of the Service Host Process. That way, a problem in one instance doesn’t affect other instances. This process is a vital part of Windows that you cannot prevent from running. 

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

So What Is the Service Host Process?

Here’s the answer, according khổng lồ Microsoft:

Svchost.exe is a generic host process name for services that run from dynamic-link libraries.

But that doesn’t really help us much. Some time ago, Microsoft started changing much of the Windows functionality from relying on internal Windows services (which ran from EXE files) to using DLL files instead. From a programming perspective, this makes code more reusable and arguably easier khổng lồ keep up to lớn date. The problem is that you can’t launch a DLL file directly from Windows the same way you can an executable file. Instead, a shell that is loaded from a executable file is used khổng lồ host these DLL services. & so the Service Host process (svchost.exe) was born.

Why Are There So Many Service Host Processes Running?

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

If you’ve ever taken a look at the Services section in Control Panel, you’ve probably noticed that Windows requires a lot of services. If every single service ran under a one Service Host process, a failure in one service could potentially bring down all of Windows. Instead, they are separated out.

Services are organized into logical groups that are all somewhat related, and then a single Service Host instance is created lớn host each group. For example, one Service Host process runs the three services related khổng lồ the firewall. Another Service Host process might run all the services related to the user interface, và so on. In the image below, for example, you can see that one Service Host process runs several related network services, while another runs services related khổng lồ remote procedure calls.

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Is There Anything For Me To vị With All This Information?

RELATED: Should You Disable Windows Services lớn Speed Up Your PC?

Honestly, not a lot. In the days of Windows XP (and previous versions), when PCs had much more limited resources & operating systems weren’t quite as fine-tuned, stopping Windows from running unnecessary services was often recommended. These days, we don’t recommend disabling services anymore. Modern PCs tend khổng lồ be loaded with memory và high-powered processors. địa chỉ that khổng lồ the fact that the way Windows services are handled in modern versions (and what services run) has been streamlined, & eliminating services you think you don’t need really doesn’t have much of an impact any more.

That said, if you notice that a particular instance of Service Host—or a related service—is causing trouble, lượt thích continual excessive CPU or RAM usage, you could kiểm tra into the specific services that are involved. That might at least give you an idea of where lớn start troubleshooting. There are a few ways to go about seeing exactly what services are being hosted by a particular instance of Service Host. You can kiểm tra up on things within Task Manager or using a great third-party phầm mềm named Process Explorer.


Check Related Services in Task Manager

If you’re using Windows 8 or 10, processes are shown on the “Processes” tab of Task Manager by their full names. If a process serves as a host for multiple services, you can see those services by simply expanding the process. This makes it very easy lớn identify which services belong lớn each instance of the Service Host process.

Xem thêm: Tốc Độ Ghz Là Gì ? Tốc Độ Xung Nhịp Cpu Là Gì

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You can right-click any individual service to lớn stop the service, view it in the “Services” Control Panel app, or even search online for information about the service.

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If you’re using Windows 7, things are a bit different. The Windows 7 Task Manager did not group processes the same way, nor did it show regular process names—it only showed all the instances of “svchost.exe” running. You had to explore a bit lớn determine the services related to any particular instance of “svchost.exe.”

On the “Processes” tab of Task Manager in Windows 7, right-click on a particular “svchost.exe” process, và then choose the “Go to lớn Service” option.

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This will flip you over to lớn the “Services” tab, where the services running under that “svchost.exe” process are all selected.

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You can then see the full name of each service in the “Description” column, so you can choose to disable the service if you don’t want it running or troubleshoot why it’s giving you problems.

Check Related Services Using Process Explorer

Microsoft also provides an excellent advanced tool for working with processes as part of its Sysinternals lineup. Just tải về Process Explorer and run it—it’s a portable app, so no need lớn install it. Process Explorer provides all kinds of advanced features—and we highly recommend reading our guide to understanding Process Explorer to learn more.

RELATED: What Is a "Portable" App, & Why Does It Matter?

For our purposes here, though, Process Explorer groups related services under each instance of “svchost.exe.” They’re listed by their tệp tin names, but their full names are also shown in the “Description” column. You can also hover your mouse pointer over any of the “svchost.exe” processes to see a popup with all the services related khổng lồ that process—even those that aren’t currently running.

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Could this Process Be a Virus?

The process itself is an official Windows component. While it’s possible that a virut has replaced the real Service Host with an executable of its own, it’s very unlikely. If you’d lượt thích to be sure, you can kiểm tra out the underlying tệp tin location of the process. In Task Manager, right-click any Service Host process và choose the “Open tệp tin Location” option.

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If the tệp tin is stored in your WindowsSystem32 folder, then you can be fairly certain you are not dealing with a virus.

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RELATED: What"s the Best Antivirus for Windows 10? (Is Windows Defender Good Enough?)

That said, if you still want a little more peace of mind, you can always scan for viruses using your preferred virut scanner. Better safe than sorry!


Windows Processes
Executable NameAdobe_Updater.exe | AppleSyncNotifier.exe | ccc.exe | conhost.exe | csrss.exe | ctfmon.exe | dllhost.exe | dpupdchk.exe | dwm.exe | EasyAntiCheat.exe | iexplore.exe | jusched.exe | LockApp.exe | mDNSResponder.exe | Mobsync.exe | moe.exe | MsMpEng.exe | NisSrv.exe | rundll32.exe | svchost.exe | SearchIndexer.exe | spoolsv.exe | shutdown.exe |WmiPrvSE.exe | wlidsvc.exe | wlidsvcm.exe | wmpnscfg.exe | wmpnetwk.exe | winlogon.exe
What Is This Process và Why Is It Running on My PC?

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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 20 years as a technical writer và editor. He"s written hundreds of articles for How-To Geek và 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, và Osborne/McGraw-Hill. He"s also written hundreds of white papers, articles, user manuals, & courseware over the years. Read Full Bio »