Here the questions arise about why the issue happens and how you solve it.
For sure, the ‘Windows Search’ helps us to get the required file faster from the PC. But you face the Microsoft Windows Search Filter Host high CPU usage related issue too.
In this entire article, I will answer the questions you have about the issue.

Why the Issue Happen
If the Windows Operating System runs the index service and picks the information about storage files, the ‘Windows Search’ consumes a high CPU. As a result, the PC might slow down and heat up.
Yes, the condition is not a good sign for the PC. Although, the index service helps you to get faster results whenever you search on the PC for files, emails, or other local content.
In this scenario, you need to solve the issue. Here I am going to exclude all possible fixes.
How to fix the Windows Search Filter Host High CPU Issue
You can close the process or disable the system, or even rebuild it. Whatever do, you need proper details guidelines. Here I am going to do that with my expertise. Before jumping to the description, let’s have a glimpse of the possible fixes.
• Fix 1: Close the ‘Windows Search’ process
• Fix 2: Disable ‘Windows Search’ service
• Fix 3: Run ‘Search and Indexing’ troubleshooter
• Fix 4: Rebuild the index
Fix 1: Close the ‘Windows Search’ process
The first thing you can try is to close the running ‘Windows Search’ process whenever you face the issue. To do that, you have to follow the steps given below.
Step 1
Right-click on the taskbar. You will find ‘Task Manager’ here. Click on it.

Step 2
Consequently, the ‘Task Manager’ will become evident. Then you have to tap the ‘Processes’ tab located on the top right side. Here you will find the ‘Background processes’ section just below the ‘Apps’ section.

Step 3
Next, you have to scroll down and find the ‘Windows Search‘ option. You will find it under the ‘Microsoft Windows Search Index’. Select it and press the ‘End task’.

Finally, the ‘Windows Search’ process will close. Hopefully, the high CPU usage will drop.
Fix 2: Disable ‘Windows Search’ Service
Disable the ‘Windows Search’ service can be another possible fix if the issue takes place. You can apply the following steps one by one.
Step 1
Firstly, press the Windows key and type ‘services’ on the search box. While the ‘Services’ interface will appear, you have to press ‘Run as administrator. You will find it on the right sidebar.

Step 2
Consequently, the ‘Services’ interface will appear on the screen. You have to scroll down and find the ‘Windows Search’ option. Whenever finding the option, right-click on it. Then you will see the ‘Properties’ command with others. Press on the ‘Properties’.

Step 3
Then you have to tap the ‘General’ tab, where you will find the ‘Startup type’ section. Expand the drop-down sign. Then ‘Disabled’ option will be visible. You have to select it. In the end, press ‘Apply’ and ‘Ok’ then.

Finally, most probably, the issue will be gone over. If you don’t want to disable the ‘Windows Search’, you can follow the next fix.
Fix 3: Run ‘Search and Indexing’ Troubleshooter
If you are looking for the alternate option instead of disabling the ‘Windows Search’, you can run the ‘Search and Indexing’ troubleshooter. The process is given below.
Step 1
Right-click on the ‘Start menu. You will find the ‘Settings’ option here. Then you need to click on it to open the interface.

Step 2
Next, you have to type ‘Windows Search settings’ on the ‘Settings’ search box. When the same-named option appears, you need to click on it.

Step 3
Consequently, you will see the ‘Searching Windows’ interface. Here you have to scroll down and find out the ‘Run the indexer troubleshooter to resolve common search issues’ command. Press it.

Step 4
‘Search and Indexing’ troubleshooter will be ready to run. You have to press ‘Next’ to execute it and wait for a while.

Step 5
After finishing the process, the troubleshooter will show the findings. Finally, you have to take the initiative to fix the issue.

If somehow, the ‘Windows Search’ consumes a high CPU, you will have one more option in your hand to fix the issue.
Final Words
Furthermore, if you want a shortcut suggestion to solve the Microsoft Windows Search Filter Host high CPU usage issue, I would recommend you to follow fix no. 3. But if you have enough time to execute, you can try the other fixes too.