For what it's worth, given my one day's worth of testing, this is what I've found. Tried installing it on my HP notebook w/950 Mhz Athlon 4 w/384 Mb. Very, very slow. Resigned myself to the fact that this was largely unworkable and installed it on my desktop 1 Ghz PIII w/512 Mb and this is, for the most part, tolerable, speedwise. The PIII also has a 64 Mb GeForce MX2 graphics card which may help matters. I would say that it probably is largely dependent on your level of tolerance, but users with older machines are probably going to be looking back at P4 thinking it wasn't so bad after all,...and it wasn't/isn't. -mkk