60!

Very new to ccleaner. Just got this new computer as I had it on the ole one. Ran as usual and then I went to issues? Their were tons of things to be fixed! So it ask if I want back up. I have No idea at all what this means! Never had that problem with the old one. So if some of you Kind people could give me some info, I would really apprecaite it. Iam also very new to computers too. Did read something about DAF? Does one need that also? Thank you for the time. 60!