I downloaded AE CS4 (trial) for Windows (for sure – ~850 MB, Mac version has ~1.3GB), but still i’ve got same problem – “Product doesn’t suppor a processor PowerPC architecture”. Everything else is fine, it shows error at the end of system check.
My computer has tweaked AMD Athlon 3000+, GForce 7600GS, 768 DDR 400Mhz (I know, i know, not enough, but it doesn’t seems to be a problem with PowerPC), Windows XP SP2.