I use this daily and on hundreds of computers. The free version is all you need. You can thank me later. Just do yourselves a favor and uncheck all boxes before you install, then go to settings and turn off all the checkboxes there too.
Glary Utilities
The 1-Click Maintenance is where you want to start (I check everything except the trails). Then, under the Advanced tab, you'll find a way to turn off things during boot-up that you don't need and you can delay things from starting right away to get up and running faster (any file-sync, like Google Drive, One Drive or Dropbox, is a good candidate for a delay). For spinner drives (i.e., non-SSD) you can defrag from here, and you can even defrag your registry if you've been using your computer for a long time.
I've NEVER had an issue with their software!