I use this program for a long time now and really appreciate its benefits before defragmentation and cleaning, however it does not close all, for a better fast result you need to use Killprocess additionally ( also not perfect )
The software developer responded to this review on Nov 04, 2007:
Thank you for the positive review. Would it be possible to send me a list of programs that SmartClose fails to close? This will allow me to test them myself and to improve the closing of programs for a next version. Thanks.