Read this post fromMiniTool Solutionto get the details.
You may want to ask the question what is ActivateWindowsSearch?
Should You Disable ActivateWindowsSearch (Windows Search)?

Sometimes your CPU is running at 100% and the speed of your setup becomes slow.
This post will provide 8 solutions for you to fix this issue.
In this case, it is actually recommended to disable Windows Search.
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What Happens If You Disable ActivateWindowsSearch?
On Windows 7 or earlier, pressing the search shortcut will no longer turn on the search function.
Windows version will no longer recognize search-based file types such as search-ms, searchconnector-ms, and osdx.

Column headers will only be able to sort items and will no longer stack or group.
Enhanced search capability will be missing from Windows Media Center.
Internet Explorer will not have enhanced capabilities.
Tablet PC Handwriting recognition will not work while the Windows search is disabled.
How to Disable ActivateWindowsSearch?
For Windows 7/8
First, you should verify that the Windows Search service is running now.
You should end it in Task Manager.
After that, you might proceed with the next steps.
Step 1:Open theRundialog box.
Then, typeappwiz.cpland clickOKto open up thePrograms and Featureswindow.
Step 2:Then clickTurn Windows features on or off.
Step 3:LocateWindows Searchand uncheck the box associated with it, then clickOK.
Step 4:ClickYesand wait for the changes to be enforced.
Then, power cycle your box.
Now, you have disabled ActivateWindowsSearch successfully.
For Windows 10
Step 1:Press theWindowskey +Rkey to open theRundialog box.
Then, typeservices.mscand clickOKto open theServiceswindow.
Step 2:LocateWindows Searchand double-click it.
Step 3:Navigate to theGeneraltab and change theSartup typetoDisabled.
Then, clickApplyto save the changes.
Windows Search is now effectively disabled on Windows 10.
In addition, I provide a feasible method to disable it.