WARNING! Do not buy Optimizer Pro! You willl be purchasing nothing but problems and get a "SAFE CART" subscription unknowingly! I purchased this program back in February for arround $30 and tried it out was nothing but a hassle and it really messed up my windows 8.1. And then I found out and had it had disabled my Norton 360. Symantec Customer Service had to turn Safe Cart and optimizer Pro off to get their software to work again. Lesson Learned so I thought! Fast forward to August and I get a Pay Pal notice that I am being charged $14.95. Called Safe Cart Number and got nowhere to get a refund and get the subcription stopped. So I called paypal and they tried to referr me back to Safecart to resolve the issue. I insisted with the rep that they either reverse the charge or treat this as a fraud claim. After several go rounds with the Pay Pal rep trying to get me to handle the problemwith Safe Cart again. The PayPal rep relented and called Safe Cart on a number they have and the Charge was reversed imediately and the Subscription Canceled. BUT WAIT IT GETS BETTER. Within 20 minutes of that I start getting numerous pop-up for Optimizer Pro and it is trying to reactivate! Then within a period of 24 hours I get attacked 15 times with high level threarts (Trojans) that my Norton Software picks up. This is more attacks than I had in the last 3 months combined. If you use this software and cancel Make sure you have a good antivirus program in place before you cancel. This is definetely a scam at best and probably a program to steal your idenity and on line account information and passwords. I Changed all of my Major account access information and passwords. WARNING!