The usefulness of Windows Search Indexing is disputable enough. You lose PC performance, a part of free RAM memory and the speed access to Hard Drive(during
the work of the Search Indexer) for possibility to fast search of a file on your hard drive. It is possible to disable and turn off search indexing to speed up system speed by freeing up CPU and the memory which is used to performing the indexing task. Disabling does not mean you can't use Windows Search but it does mean that the searches will take more time. To disable it:
Disable Search Indexing Service:
Run WinTools.net and select System Services point of MS Tools menu:
Or press Windows + R buttons of your keyboard, type services.msc and press OK.
In the list of Services mouse double click on the Indexing Service entry. In a popped up dialog press Stop button, select Startup type: Disabled to permanently disable the indexing service so that it won`t run again and press Apply button.
Disable Indexing on Drives:
Click on My Computer. Right-click on any disk you do not want to be Indexed. In the General tab uncheck Index
this drive for faster searching and click Apply.
In the resulting window choose Apply changes to drive X:\, subfolders and files, click OK and ignore everything for any error messages.
Do it for all hard disks.