rebuilding index in windows 10

Fix Microsoft Windows 8.1/10 search protocol and indexer high CPU load problem


This article will help you to fix a search indexing problems on Windows 8.1/10 that actually takes too much CPU load. This is a problem that seems coming to Windows 8.1 and 10.

At first, make sure you really have some problems with CPU load.

Go down to Taskbar, right click on it, run and look at your Task Manager.

taskmanager wnidows10

If your CPU load is high, check if Microsoft Search Protocol Host and Microsoft Search Filter Host processes both at high level load. If they are – you have this issues too.

cpu load windows10

So how to fix this?

Here is a guide:

Click the Start button => go into Control Panel. Make sure that you are in Icon view, not Category.

Go to Indexing options.

control panel windows 10

The first thing you need to do is to modify what are the indexing will check at.

modify indexing options windows 10

Remove all the check marks except OS (C:) drive and click OK.

indexed locations windows 10

Then go to Advanced indexing options and click Rebuild index button.

rebuild indexing windows 10

Now you will see this message:
Rebuilding the index might take a long time to complete. Some view and search results might be incomplete until rebuilding is finished.

rebuilding index message windows 10

Click OK.

What it does is at the top of the Indexing options window your indexing will go from whatever number it is to zero and it’s going to start building index again. Click Close.

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Once you do that after a few seconds you need to look at your Task manager again and notice that Search Protocol Host and Search Filter Host processes are taking much lower CPU load now.


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  • X_Robert

    The reasons to this issue are various, including bad drivers, many apps running in the background… The high CPU in my computer was caused by the drivers. After I used Driver Talent fix the driver, this performance improved.