Disk optimization

I try to run Disk Optimization and it keeps cancelling itself out.  Despite numerous attempts at "help" from Symantec, the problem persists.  :smileymad: Their idea of help is to unstill Norton and then reinstall it.  While this works for a couple of days, in less than a week it's back to cancelling itself out.  This is driving me nuts.    :smileysad:  Does anyone have any other suggestions for me to try?