If you notice that your entire computer seems to be running extremely slow, what is the first step you should take to diagnose the issue? Select one: a) Your computer may be running out of hard drive space. b) Try deleting any files or programs you don't need. c) Run a virus scanner. d) You may have malware running in the background that is slowing things down. e) Run a full scan on all your applications. f) Run a Disk Defragmenter to see if your hard drive is working properly.