Hi,
Are using any program to run or check the system maintenance?
This issue can be caused if you have enabled the System task scheduler for system maintenance.
We do not recommend you to disable Automatic Maintenance. If you wish to disable Automatic Maintenance you may disable it.
Follow the steps to disable Automatic Maintenance:
- Press Windows + W keys and type Task Schedule.
- Open Task Scheduler.
- Browse to Task Scheduler, Microsoft, Windows, Task Scheduler.
- Right click Idle Maintenance & Regular Maintenance and select Disable and exit the task scheduler window and check if it is disabled or not.
Reference Link:
Schedule a task.
http://windows.microsoft.com/en-us/windows/schedule-task#1TC=windows-7
However the article is for Windows 7 you can refer it for Windows 8.1
Hope this information helps. Reply to the post with updated status of the issue so that we can assist you further.