There is a very useful feature in Windows 7 and later versions that creates an index of all the data on your computer. Whenever you need to search for something, Windows search just searches through the index to provide you with quick results instead of going through all the data on your hard disk, which could take several hours. Windows creates the index the first time you start your windows based on the data already written on your hard disk.
Rebuilding the Windows search index:
Although the search index is a very useful feature, it needs to be rebuilt often. If the index is not updated frequently, the data can become corrupt and can provide you with incorrect results. This happens due to large amounts of data that you usually write to or delete from your hard disk, resulting in a large amount of new data that needs to be indexed, and deleted data that needs to be removed from the index. Therefore, it is important to rebuild this search index every few months in order to insure that your computer gives you quick and accurate results. To rebuild your index, go to the Control Panel and click on Indexing Options. Next, choose Advanced option and then click on the Rebuild button. This process could take several minutes, but it will make searching quicker and easier for you in the next few months.
Disabling the Index for increased performance or extra disk space:
Another tip is that if you do not need to search things too often on your computer, you could disable it in order to improve your system performance. However, it is not recommended because even if you rarely need to search for files or folders, disabling the search index could make occasional searching difficult and time consuming. You can disable it if you only use your computer for gaming and want to ensure maximum performance, or if your computer is very slow and you need to use it for many months to come before you earn enough cash to throw out your old computer and buy a new one. Another reason to delete your index could be to save disk space. The windows search index approximately takes 10 percent of the space of the original data. For example, if you have data worth 100 GB on your hard disk, the search index takes nearly 10 GB of your disk’s space. That is a decent amount of free space if you are in desperate need for space to install essential software or your favorite game.
Although decreasing startup and shutdown time, improving system performance and freeing extra disk space seems to be a dream for any computer user, the windows search index is a remarkably useful feature and can save you lots of valuable time when you need to find something on your computer. Hence, it should not be disabled unless it is extremely necessary to do so.