Runtime Broker high CPU usage

win10系统下Runtime Broker进程占用过高内存,CPU解决办法

This has become quite a long thread so I’ll try to summarize it:


A process called Runtime Broker has a high CPU usage in Windows 10 (final release version).


Unknown, there seem to be multiple causes and multiple solutions. May be related to OneDrive, permissions for metro apps, Background Task Infrastructure Service, Windows spotlight thingy, windows tips and a number of other apps.

Solutions thar work for some:

  • Registry hack: run regedit.exe, navigate to HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\TimeBroker, change “Start”=dword:00000003 to dword:00000004. This will affect parts of Cortana, like new apps not showing up and you can’t set reminders.
  • Switch your lock screen background (Settings -> Personalization -> Lock Screen) from Windows Spotlight to Picture. Preferably but not necessarily a picture of a ninja cat on a dinosaur 😉 Additionally disable the live tile of your photo app by right clicking on it.
  • Settings -> System -> Notifications & actions -> Disable “Show me tips about Windows”
  • Disable (at least to test) the P2P sharing in all settings>update>advanced>chose how updates are delivered. Set “updates from more than one place” to off.

If these don’t work, your odds of finding a fix have dropped considerably, but you could try:

  • Try disable background Apps:  go to “Start->Settings ->Privacy -> Background Apps” and Turn-off those apps.
  • Deleted Groove music using powershell. Used these commands: Get-AppxPackage -name “Microsoft.ZuneMusic” | Remove-AppxPackage     Get-AppxPackage -name “Microsoft.Music.Preview” | Remove-AppxPackage    (To bring up powershell, press win+r and type powershell. Hit enter, copy and paste one at a time).
  • Disable/delete OneDrive / SkyDrive
  • Disable Google Drive if you use it
  • Remove .Net 3.5
  • Remove any external drives / NAS locations from your Photos and Music libraries
  • Close all programs and restart them one by one to try to find the culprit, uninstall the culprit. Yes, we’re in the desperate stage.
  • Do a full refresh of Windows 10. But note: many people have the problem persist, even after a vanilla install of Windows 10.
  • Send MS an angry e-mail. Wait for them not to respond. Throw a brick through the Windows(R) of your local MS office. Won’t fix the problem, will fix your frustration for a while.

Thanks to everyone who posted a solution i incorporated in this post. Please let us know if any of these fixes worked for you.

If none of that works for you

See instructions below by ZigZag3143 to create a report. Please create a new thread with your report and e-mail ZigZag by using the link to the thread on his profile. Do not e-mail the trace.

Edit: i went through the thread a few times to aggregate plausible solutions in this post. Latest was 14-8. Also, i removed the comment that after resetting the registry hack, the issue was still fixed for me. Turns out I had misnamed my registry files. After resetting the registry the issue came back after all.

original post:

I have just upgraded my pc to Windows 10. After install, I reset it to get a fresh clean installation. That made a huge difference in responsiveness of the start menu, which before used to take 20-30 seconds to open. However, now a process called Runtime Broker is taking up 20-40% of my CPU. I googled that this app is about permissions for metro apps or whatever they’re called. I’ve found several threads about either high memory usage or antivirus, but I don’t have any antivirus installed except windows defender and Runtime Broker only uses a few MB of memory. But it does hog my CPU. I did try manually ending it with the End Task button, but then it restarts within seconds and keeps hogging my CPU.

For now i applied a registry hack. Changed [HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\TimeBroker] “Start”=dword:00000003 to dword:00000004. While that stops the process from hogging my cpu, i have no idea what i’ve done and what the consequences are.


– Windows 10 build 10240, pro with all updates installed, upgraded from a genuine 8.1 pro.

– No additional Metro apps installed. I tried uninstalling a bunch of them but they just get reinstalled

– Computer: Samsung Ativ Pro convertible XE700T1C, multiboot with Windows 8.1 home oem that came with it (so two genuine licences on different partitions on one system)

Please help me! What can i do to get this properly fixed based on understanding the cause of the problem rather than random registry hacks.


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