The indexing service is more trouble than it's worth. It will tend to slow your system down as a whole. So even if you spent a great deal of your day searching for files, you'd be better off just spending a day or two organizing everything in such a way that you don't need to do so much searching.
But if you want to find out for yourself, select Properties from the right click menu of a given drive/partition in My Computer, and at the bottom of the resulting window should be a little check box concerning the indexing service. Hit that, and the system will likely start indexing every file on the drive, which could take a while.
While searching for something on my comp it said searching could be faster if indexing service was enabled how do you enable this service?
regards Steve
Chowhound
Comic Vine
GameFAQs
GameSpot
Giant Bomb
TechRepublic