Installed 4.9.21 PRO on my shop computer, WINXP,P4, 1.6 Ghz, 512 mb RAM,, and I only have a 56K connection here. Shame on me. But the LimeWire program is always disconnecting. Why anyone would use 56K modem is beyond me but I gave it a shot. I was using 4.8.1 and it ran fine. I barely start downloading and it deteriorates from Turbo to zilch to disconnected.