I have 6 client computers, one 'server' computer. they're on a peer network (workgroup) that uses a shared folder on the server. they are all running vista business x32. Everytime the server has been on and the clients transfer files back and forth (nothing big, just 10-1000kb at most) for a 4-5 hours suddenly one or two clients start running SUPER slow. The server becomes almost unresponsive to their file requests. If i go over to the server and use it, it appears to be fine. If i restart it, the clients are automatically able to transfer at normal speeds again (mind you i dont have to restart the clients). What is the problem here? I: 1) replaced the network card 2) did the netsh autotuning disabled thing 3) disabled tcpip v6 4) disabled QOS packet scheduler 5) changed the network cable and the port it uses on the hub 6) Power management set to high performance (thanks for the thought GrofLuigi) I had this set from the second i booted up the computer 7) Removed Symantec (thanks to nitro & club) but to no avail What else can i do? The server is not running any extra software, except symantec corp...which every client also runs. it's a brand new dell optiplex 755 core 2 duo, with 2gig of ram and 2 80gb 7200 rpm sata2 disks on raid 1. This problem makes ZERO sense to me. Please help! I'm THINKING it mighttt be something about how many simultaneous connections the computer can have to it?? Is there anyway to increase this? I know xp pro was 10 and that was due to a licensing issue but i'm wondering if it's lower with vista??