Hi Energy, everyone has given some good advice. As said before,
it may be possibly a floppy drive problem too, but never had
that cause a CPU Exception...
Not sure about copyright issues, but re-writing the boot block
should do the trick, as stated. But PLEASE get a good virus checker,
because IIRC, a virus can 'migrate' from memory to a disk and vice-versa.
So, write-portect your disks, and get something like virus checker II
(I have VC set to check boot-block of any inserted floppy disk.)
As for a HD and newer ROMs, well it certainly makes the Amiga
easier to use. Only idea for you is that you could (eventually)
install WHDLoad and play those games from the hard drive.
My father had quite a few games on his A600 (2 MB chip, 32MB Fast,
1GB harddrive, '030/33Mhz , pretty tricked out for a 600..)