I don't know if this is a normal feature of indexing, but every time I start up my PC or laptop, indexing starts automatically. This happens after indexing has finished on a previous PC session and I have closed down my computer. There are occasions where I have started up again an hour or two later to resume my work and indexing starts all over again. It seems that indexing is triggered on start up, regardless of the fact that it has just finished on an earlier session an hour or two ago!.
I have had to pauses indexing on a couple of occasions, as it seems to like to 'take over' my processor speed. Any (constructive) ideas would be welcome!