A small Word document (79 KB) is consuming 34% of my CPU, the document was working fine, but suddenly its performance went down, and I noticed that it is consuming the CPU. What might be the issue here?

Any help is appreciated

Hani

Hi,

In regarding of the issue, please provide us more information to assist you better.

• Did this issue occur with the particular file or other file?
• Did this file include some macros?

This issue might be caused by some factors. Please try the following methods:

1) Turn off the "Checking spelling as you type" option in File/Option/Proofing.

2) If you have turned on the Office 2013 "Touch mode", please try to switch to "Mouse mode".

3) Turn off "Show or Hide Preview Handlers in Preview Pane" in Folder Options

• Open Folder Options in Windows 8.
• Click/tap on the View tab, and do to step 3 or 4 below for what you would like to do. 
• To Show Preview Handlers in Preview Pane
  NOTE: This is the default setting.
•  A) Check the Show preview handlers in preview pane box, and click/tap on OK.
•  B) If you have not already, you will need to also turn on the preview pane in Vista, Windows 7, or Windows 8.
• To Hide Preview Handlers in Preview Pane
•  A) Uncheck the Show preview handlers in preview panebox, and click/tap on OK.

If this issue still exists, we might try to use Windows Performance Toolkit to monitor which process causes this issue.

Hope it's helpful.

Regards,

George Zhao
TechNet Community Support

Many Thanks for the helpful input George,

I faced this problem with a particular file, and the document does not contain any macro.

I've disabled proofing tools, and everything went well!

Once again, thank you for your valuable response!