pretty sure it only comes with windows 10. Use OBS, it doesn't have any of those pesky watermarks, free trials and you don't have to pay.
Same. I use QuickTimePlayer, and iMovie to basically edit anything I want to. But that's for Mac, so it's a different story.
I currently use the full version of fraps. When I first started recording, I used bandicam. Fraps has better quality in my opinion. I've also tried using OBS, but like reborn said, it's quite complicated. I've tried camtasia, it's good for 30 days, then you have to buy the full version or bypass the free trial. camtasia is very good, it also has a video editor added. I have not receive malware from fraps, it could be where you downloaded it from. Fraps for me is easy to use. Easy to record, easy to file, and easy to upload.