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Windows 2003 is getting a bit long in the tooth, but we've got a number of customers that are still happily using it, and for good reason — it's a solid work horse of an OS.

We've recently come upon an issue where some of our 2003 servers in the lab were pegging the CPU at 100%. Investigation revealed svchost was the culprit. But there are lots of svchost processes, what is it really doing? There is a cool trick to figure it out:

Here you can see the PID associated with those svchost processes, and which service is running in each. Look in Task Manager to get the PID, compare to this list, and you've now narrowed down which service is hogging the CPU.

If you notice your computer struggling to keep up, you might first turn to the Task Manager to find out what application is causing the excess CPU usage. In some cases, you might see that svchost.exe or Service Host is taking up all your CPU power. What is this process, and more importantly, how do you keep it from monopolizing your CPU? In Windows If you are experiencing the Service Host using too much processing power, read on to find the answer to your questions and resolve the issue.

Service Host helps “host” certain services on your computer. These services are usually designed to run in the background and not cause many problems, but there are some cases where Service Host apps can become corrupt and begin consuming more processing power than they should.

Some apps and programs on your computer are called stand-alone executables and can run by themselves. However, many services are DLLs (Dynamic Link Libraries) that don’t contain all the information needed to run by themselves. These DLLs need Service Host to load and run on your computer. For this reason, you usually have several Service Host processes running when you open your Task Manager.

Many Windows users experience a bizarre and highly menacing problem where a specific process named svchost.exe (netsvcs) starts requisitioning and using more and more RAM after the affected computer boots and fails to let go of the RAM regardless of how much it accumulates. Check this link right here now ==>> svchost Exe high CPU usage