I'm a licensed Microsoft Retailer....I have windows 8 running on a couple of my office computers...been playing with 8 for a while now...it is different. That being said, you need to have memory....LOTS AND LOTS of memory. For it to run properly, 8 gigs should do it. You can get by with 6, but 8 is better, especially if you graphics memory is shared with system memory. It appears it is as responsive as a 7, maybe a little better. Both PCs where upgraded from Win 7..I'm planing on doing a "clean" win 8 (meaning, wipe out the hard drive and install win 8, rather than upgrading an existing win 7 install) install this weekend. See if that speeds up performance. I haven't installed it on a laptop yet however, i have read a bunch of tests.. it does wifi better, which will help battery life. It also REALLY DOES turn off ports when not in use...unlike previous Windows releases. It does a better job managing them to save power. It also does a better job of thottling processor power which will really help battery life. I've seen charts where it has extending battery life from just a few minutes to a couple of hours. Again, I need to verifly this info so take it with a grain of salt.