I have 10 HP computers in a school setting that just came in with AMD Athlon and Windows xp 64 bit operating systems. These computers will not accept our Antivirus, Corporate NAV V10 and other software the teachers use. I am to “dumb down” these computers with Windows XP & told to just use the Product Key on the side of the computer that came with…this will not work. Does anyone have any suggestion short of buying 10 Win XP Pro operating system & tossing the 64 bit version? Thanks for any help in advance. Linda