1) i'm currently running AVG, Kerio anti virus (my dad[owner of machine]'s reccommendation) MS antispyware and AdAware. Crap Cleaner and Spybot get run almost weekly.
2) with macOS, files go: in apps. there will also be 1, maybe 2 com.apple.[ ].plist files added to the library. and that's it. in windows, they go everywhere. i have, right now, at least 20 random application ghosts around the computer, best to find them in Add/Remove Programs, in that list. completly unremovable without delving or using third party. and that's just what the computer chooses to tell you about. i have no idea the level of corruption in this horrid box. i'm guessing the level of a third world government. it's not the loss of disk space - it's the feeling of a loss of conrol. it is pretty much as clean as third-party apps can get it ( i know) and i still know its... dirty (sneered).
3) i'll try the memtest.
4)i don't like internet on this because a) it's dangerous, and b) because it's not safai. - safari is (without being shallow) sleek. it takes up 2 1/2 'lines' of title space. making my big monitor appear bigger (more room). IE uses 6 for the same configuration. seven if you include the start bar. making this 15" wonderCRT seem even smaller. safari is also FAST. very fast.
5 ) i must admit i don't defrag that much - if i was pro on this (i use my mac for pro) i would probably have to more often. i defragged my friends old thinkpad running xp. a 6gb hard disk took 4 hours. tedious. the one in this is 80gb 5000rpm NTFS.
and to the 'nixers, it's actually my parents machine. they'd flip if i did that. i can';t wait until the house is networked so i can get my baby back online. or just until i move out again. a month and a half until my flats ready to move into