![]() For example, if you open Notepad from start menu (which is Windows Explorer) then explorer.exe is the parent of notepad.exe. Parent-child relationship: If a process a.exe starts b.exe then a.exe parent of b.exe. Click again to reset the tree structure back. If you want to sort the list alphabetical order of process names (like in Task Manager) then simply click on Process column title. It also shows the icons of all the running processes. For example, all the svchost.exe are child of services.exe. The Process column of the window lists all the running processes in a tree structure demonstrating the parent-child relationship of the processes. The very first thing to notice about this process tree is that it looks somewhat similar to Task Manager’s ‘Details’ tab, but much more colourful. The main window of Process Explorer looks like this: Other features of Process Explorer are covered later in this series. This blog will cover the main process tree. This blog series is aimed to cover many features of this powerful tool in detail. ![]() It can be downloaded from Microsoft TechNet website from here. Its pretty much advanced version of in-built Task Manager. More information can be found in my post-mortem.Process Explorer is a SysInternals utility that displays even minute details of running processes. C:\WINDOWS\system32>PowerCfg /SETACVALUEINDEX SCHEME_CURRENT SUB_PROCESSOR IDLEDISABLE 000Ĭ:\WINDOWS\system32>PowerCfg /SETACTIVE SCHEME_CURRENT To fix this, you can run the following two commands, which sets the IDLEDISABLE setting back to "0" and then re-applies the power management configuration. Process Explorer seems to always discount the System Idle Process and not include it in the total CPU usage, which is why it displayed a lower total CPU usage than Task Manager did. Additionally, this manifested in the Task Manager as "100% CPU usage". IDLEDISABLE prevents the CPU from throttling itself, causing heat and the fan noise I observed. In certain cases, after taking the headset off, the setting is not changed back to the default of "0". Because the Rift, a virtual reality headset, requires low latency, their software seems to set the IDLEDISABLE power configuration to "1". Process Explorer is only showing 1-2% CPU usageīefore I go uninstalling everything, how would I figure out what's causing the issue if nothing weird is showing up in Task Manager or Process Explorer?Īfter much debugging, I was able to come to the conclusion that my specific case was related to a bug in the Oculus Rift software.CPU is not throttling down automatically based on the dynamic load, causing high temperatures and the fan to kick in.No individual process is taking up significant resources in the resource monitor list.Task manager and resource monitor graphs shows 100% usage total.This same issue also occurs in Safe Mode, so I'm guessing that it's more along the lines of something to do with Windows itself. I've already run both Windows Defender and Malware Bytes (a virus was my first guess), but nothing has turned up yet. Again, nothing looks out of the ordinary in the process list, but the processes are showing the levels of activity I would expect in Process Explorer. The really weird thing is that Process Explorer shows only 1-2% usage when idle, with the System Idle Process taking up the remaining ~98% as I would expect. Everything seems to be "using" a significantly higher amount of CPU resources than it normally does.Īs an attempt to diagnose the problem, I've also tried using Process Explorer. ![]() None of the processes are abnormal, and though the process CPU percentages do add up to 100%, it doesn't make sense to me that each individual process is taking up as much CPU as Task Manager says it is. The weird thing is, when I look at the process list, there isn't really anything obvious that's triggering it. If I go into the Windows power settings screen and manually change the processor power maximum to 50%, then it's capped at 50% frequency (~1.5 GHz), but it never goes below the maximum possible frequency. Because of this, it's constantly running at 3.3 GHz and the temperatures are rising to the point where the fans kick in at full force. ![]() Starting yesterday, I have a very odd problem on my Windows 10 desktop- my CPU is constantly running at 100% (according to Task Manager), and it isn't throttling down.
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