Whenever I work on someone's computer, I put a folder called Computer Maintenance on the Desktop. In that folder I put aliases for all the programs I used to work on that particular computer. It almost always contains Malwarebytes, Auslogic defrag (all drives but Solid State), Windows Disk Cleanup, Chrome and/or Firefox, whatever free anti-virus they want (usually MSE or Avast), and sometimes Super Anti. I cannot recommend a paid anti-virus, but will leave what they have (usually it is expired). I also usually leave a notepad doc of what I have done and when.
I tell customers they may delete the folder at their peril. I also tell them, "You know, you could update and run those programs yourself," but they never do . So I charge them again the next time, but the folder makes my job easier.
P.S: again, you can install all those program in about three clicks with ninite.com.