I used to buy the O&O Defrag, the last one I bought was version 26 - I came to the conclusion it was a waste of CPU cycles, RAM & from my basic observation made not one jot of difference - I have two SSD's in this PC, a Samsung Pro 1TB & a 4TB Western Digital which is mainly used for storage - If or when the Samsung breaks I will replace it or I find something better without it breaking. Having a program running that again in my opinion does absolutely nothing (noticeable) & uses PC resources for me is pointless.