Here are two links that help you with both of the above questions, or at least, they are helping me!!
Naturally, few of us use Win8x, but I cannot believe that a different Windze OS will make much of a difference personally with regard to an Antivirus software, but please be aware of this.....
Best of luck.
Antivirus:-
http://www.zdnet.com/antivirus-on-windows-88-1-compared-7000025359/?s_cid=e539&ttag=e539
Disk drives:-
http://www.zdnet.com/who-makes-the-best-disk-drives-7000025375/?s_cid=e539&ttag=e539