I recommend taking the computer to a professional to fix it. It may cost $100 to do so, but they can figure out what things are causing the computer to bog down, and delete them.
Most people do not have the skill or knowledge to do it themselves.
I wont make that mistake again, reformat is now the only option I use on hacked machines. RF takes 2 hrs max. And the system is clean. AV AS & AM cleaning is a labor intensive process. Boot reboot clean rinse repeat ad nauseum.
Then she was upset because she lost her cookies. LOL...
I am one of those professionals. There is a line where it is actually cheaper to buy a new computer than to pay a professional to rebuild the OS, do the updates, re-install the applications, and restore the documents and data on the old one. If that job has to be done anyway, it is often better to take the opportunity to upgrade the computer to gain speed and greater capability.
"""Most people do not have the skill or knowledge to do it themselves."""
Actually its most Mac users that dont have the skill or knowledge to do it themselves.