Have you upgraded lately from a uTorrent older - 2.0/1.8x - release to the new V 2.01/x ?
Is it a new install of uTorrent ?
Cannot reach the speed you used to have ?
Having some memory issues ? CPU load increase ?
Router/Internet are overloaded ?
(1.) If nothing works for you... :
No downloads, no seeding , active torrents are in red, no green net-status, in trackers' tab - none are connecting... check this:
[1] If you have a router - check that your port is still being forwarded and is opened [Control-G->setup guide] and for both TCP + UDP
[2] Check that you have enabled/excluded the new release in your Windows firewall/3rd party firewall (replacing the old rules)
(A) For fixing CPU load/memory issues/stability:
[1] In pref.->advanced->Disk Cache Make sure :
1a. ->Disable Windows caching of disk writes/reads - are both checked
1b. ->reduce memory usage when the cahce is not needed - is unchecked
[2] Make sure pref.->advanced->gui.transparent_graph_legend is false.
[3] Win7 users might experience uTorrent process not closing properly.
(
For improving low speed issues:
[1] Make sure your upload speed limit is correctly set to about 70-80% of your connection's maximum upload-speed/cap (you can confirm it @ http://speedtest.net or use the options->setup-guide (control-G) )
[2] Settings that might improve (reduce) your overhead:
2a. Set pref->advanced->net.utp_dynamic_packet_size =false
2b. Set pref->advanced->net.utp_initial_packet_size = 8 (use MTU size)
[3] Set pref.->advanced->bt.tcp_rate_control = false
[4] If you want to use your full line speed capacity for download, but your connection upload:download-speeds/cap ratio is bad (lower than 1:10, such as an ADSL 10 Mbits/sec download :and: 800 Kbits/sec upload) you can reduce the use of uTP (and the larger overhead caused by it):
4a. Support only uTP incoming connections by setting pref->advanced->bt.transp_disposition = 29
4b. Alternatively - disable the use of uTP by pref->BitTorrent->Enable Bandwidth Management = unchecked
(C) For improving Internet chocking / router issues:
[1] First, make sure you have set a proper upload speed limit { (

.[1] above) and that your max # of connections/slots are per the setup-guide
[2] Change setting per { (

.[3] above }
[3] Set your pref->advanced->bt.connect_speed = 5
[4] Set your pref->advanced->net.max_halfopen = 8
