What is svchost.exe?

If you’re on a Windows machine, you’ve no doubt been forced to do the three-finger shuffle - control-alt-delete (^-alt-del), which was invented as a programmer’s debugging tool by my namesake, David Bradley. Rather than rebooting the machine, Windows brings up the Task Manager, with this command and lets you see what is running on your machine and kill suspicious processes. So, you’ve probably seen entries in the Task Manager list like “svchost.exe”, “jusched.exe”, and “ctfmon.exe” and asked what are they and why are they running?

Microsoft says that svchost.exe is “a generic host process name for services that run from dynamic-link libraries”, in English, it’s a system program that launches other Windows system programs that cannot be run directly without being hosted. So, it’s not a worry, but if you see dozens of svchost.exe entries in Task Manager, you might think about trimming down or disabling unneeded Windows services (How-to Geek has a lot more on identifying what each svchost.exe might be hosting).

Do not confuse svchost.exe with scvhost.exe in which the c and the v are transposed, this could very well be a virus and is not an essential Windows component.

Meanwhile, if svchost.exe is not your concern, then perhaps you’re wondering what “jusched.exe” is doing in your Task Manager list. Well, jusched.exe is the Java Update Scheduler, it uses up a stack of memory to do nothing more than a monthly check of the Java servers and downloads an update. You can disable this task permanently through Windows Control Panel, Java Control Panel section.

Finally, How-to Geek highlights a third Task that you may be curious about, ctfmon.exe. “Ctfmon is the Microsoft process that controls Alternative User Input and the Office Language bar,” How-to Geek says. If you use any of those tools and devices, leave well alone, for the rest of us, you can safely disable ctfmon.exe and H2G explains how-to.

If you’re curious about any other entries you see when you open Task Manager, then leave a comment here giving precise details and the name of the entry and I’ll see what I can find out about it for you.