Hi Broderick_s,the answer is no and yes. No it is not hard on the computer. Yes in it is my understanding that windows creates a Icon cache file to speed up the displaying of Icons. I read somewhere on the web that the icon cache file can become corrupted, then windows has to read each Icon and this will slow windows down. The web site said you had to delete the icon cache file, and windows would recreate it when you restarted it. I also run the program Cacheman, while it is no longer freeware, it only cost $10, IMHO it is worth three times that. You can download and try it for free. With it you can make the icon cache file larger, so it can hold more icons. You can read about it in the help file.
Come see me at Systematic Investing group #board-966 lets talk formula plans.