I started with the Advanced System Care program several years ago. First the free version which cleared a problem on my then Windows 7 PC that no other could fix. Fast forward to the past 3 years, I have purchase the entire suite of six IObit programs. It has never corrupted or harmed any part of my PCs (I use it on 5 PCs). The suite package of programs work very well together. The rare occasion when I emailed customer support, they have been wonderful and always made things right and quickly. I don't understand how my experience can be so good yet there are those negative posts. Therefore I have to be suspicious of those negative posts. MY ONLY CONCERN is, to my understanding, IObit is based in Hong Kong. Now that HK has been seized by China, I don't know if I can trust the software. Presently I am also testing Bitdefender for that reason.