Having tried on an off for several days on and off to install 12.04 unsuccessfully I today actually got a useful message during installation when it froze "stopping CPU interrupts balancing daemon" There the system froze. The processor is a 32 bit AMD Athlon XP-M in an Asus Laptop. Looking at the versions of 12.04 available for download I notice that AMD64 processors need different downloads to Intel processors and have different checksums.
Need some expert advice here? Is 12.04 a non starter so far as my particular processor is concerned or will the AMD64 (which is presumably designed for a 64 bit work? Does anyone know?