Don't know about harddrives, most harddrives are fine and can handle indexing, never seen a HDD so bad that it couldn't (can slow it down, but never too bad); but if your processor is really slow, then so will your searches be. Like airbot posted (he beat me to it), you can fix up the indexing via those links and take out any searches that you don't want happening. that will speed it up. the lower number of indexed files, the faster it will be. You can also move the index to a faster harddrive (if you ever get an SSD, those things are great). You can also select any harddrives (if you have multiple) that you don't want indexed and uncheck the box that says to index files on the harddrive (accessed via computer).