I love Spotlight, I use it every day to find files, folder and start apps. But something that bugs me more and more is how it just goes crazy and indexes several times a day, for an hour or more at a time, causing the computer to pretty much stop. Opening MS Excel takes a long time as it is, but with Spotlight indexing it can take, and this is no joke, up to ten minutes to open a simple spreadsheet no bigger than 300*50 cells. Opening iPhoto (around 60 GB, 20 000-ish photos and videos) is something I simply don't do anymore without first checking if it's indexing. Time Machine backups during an indexation means both indexation and backup takes absolutely forever - Activity Monitor showing disk activity of less than 1 MB/s combined write/read. I just can't take it anymore, it's affecting my productivity and stressing me out to the point where I simply use an old Acer Aspire One (1.6 GHz, 1 GB RAM) with Windows 7 installed - because it's just so much faster than my early 2011 13" base version with 8 GB RAM. Even scrolling on a webpage is turned into a character building test of patience. When it's not indexing, it's as blazing fast as it was when I bought it. I've installed ML fresh several times, I've even switched disks because I've been certain that there must have been something wrong with them, but it takes no more than a handful of days before it's back to the same way. The only way for me to be able to have a fast computer is by adding all drives to the "do not index"-list, but that kills one of my favourite features in OS X. Can anyone help me? Is it possible to simply block Spotlight from indexing during office hours, or is there an alternative that doesn't piggyback on Spotlight's indexing?