xp pro sp2 Amd Athlom 64 3000+ 1.81 ghz.2 gb ram over 300 gig hard space so far so good ,low cpu ,faster load up recheck 300% fast than 1.6.1 on a 30 gig upload.. fixed blue screen of death gone from 1.6.1 with large files (memory crash) upnp maps a1 (you must set up a port on your router to make it work right) nat-pnp port doesn't map (may not be for my set up)?? is this for network? or voip? heavy testing still to be tested PECompact compressed (normal) version UPDATE private tracker bug: found that turning off nat-pnp i get a green light not yellow..need to be added in code to be turn off when upnp is mapped .they must hate 1 other lol now all private trackers are back up and see me again ..download has double and upload now join with no drop outs. ok back to seeding again