1| I think you've posted in the wrong section regarding your thread. Mind sharing your OS and the version you're on?
2| Often times with Windows 10 and prior, it was more worth while to just move ahead with a clean install. Might it be possible to state what you were tinkering with, in the first place? Perhaps it's something to do with a corrupt OS if the restore points are missing(and if they're supposed to be there).