I'm not sure if Advanced SystemCare is the same protection as Malware Fighter Pro, which also supposedly uses Bitdefender engine (Malware fighter free doesn't, I guess), but that one seemed really bad in this review. I'm kind of wondering what using the Bitdefender engine means, given this outcome:
IObit Malware Fighter is not an AV, and it doesn't have Bitdefender.
I don't know enough about defraggers to offer an opinion on SmartDefrag.
IObit Uninstaller is quite good. I use it simultaneously with Revo; it often gets things Revo missed.
IObit Unlocker is very good to have in your context menu.
I have Advanced System Care. I never use the One Click or registry cleaning on it or any other utility program. ASC provides a very good shortcut fix. Its file shredder is good. Its disk space analyzer falls well short of Glary.
The other day I had a session die because of Roboscan's real time service settling in at 70% CPU Usage. That was the last straw with Roboscan for me. I had just gotten a one-year giveaway of Advanced System Care Ultimate, so I made it my AV. I have had one month trial with ASCU before. I have tried Avast, Webroot, and Roboscan. I would rate ASCU as the most lightweight AV I've had. Until I transition to a new computer, that's important to me.
Last year I had an Advanced System Care Pro giveaway on realtime. I got very upset with it, because it kept on changing my Quick settings. At one point I caught it deleting my Firefox history. Appalling! And of course contrary to how I had set it. I took it off realtime. I have never had Advanced System Care Ultimate change my settings. If it does, it gets the boot.
IObit has lots of giveaways for its shareware.