these istructions saved my life🙂
check it out: http://forum.utorrent.com/viewtopic.php?id=74820
Have you upgraded lately from a uTorrent older – 2.0/1.8x – release to the new v 2.X (2.0.4/2.2) ?
A new install of uTorrent ?
Having some memory issues ? CPU load increase ?
Router/Internet are overloaded ?
Cannot reach the speed you used to have, or having a fluctuating/crappy speed ?
You might not need that –
Go on, try and read this, it might help!
[size=1.3]Oh… and if it did help you, please post below – what and how. Thanks [/size]
If you have a pre-2.01 release installed (1.8.5+), you should be aware that the main things that have changes and might effect you are:
1) Your traffic overhead (being the ack packets in the reverse direction to the actual traffic, or the headers inside them) is now being clearly viewable:
You can see it on the dotted speed-graph lines + the “O:” on the bottom status bar
If your “Bandwidth->Apply rate limit to transport overhead” is enabled ( advanced->net.calc_overhead = true in pre-2.03 releases), overhead will also be counted toward your speed limit (added to your payload-data speed).
2) Support for the uTP (UDP based) protocol was added (in V2.0 and up – added out-going connections’ support)
Also, you can not choose NOT to limit only the uTP payload speed in the Bandwidth pref. dialog.
This latest release has also a bit larger amount of connection per second rate than before.
On post XP systems – the bt.max_halfopen (concurrent connection attempts) default value
was increased from 8 to 25, and both TCP AND uTP connections are being tried for every peer.
3) Files read/writes is differently handled, and your Windows disk cache might be causing some issues (crashes/hangups/slowdown).
4) Several other default settings’ values were modified/added
[size=2]My mini-guide/suggestions for a 2.0x user:[/size]
0. 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:
 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
 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:
 In pref.->advanced->Disk Cache Make sure :
1a. ->Disable Windows caching of disk writes/reads – are both checked
1b. ->reduce memory usage when the cache is not needed – is unchecked
 Make sure pref.->advanced->gui.transparent_graph_legend is false
 Win7 users might experience uTorrent process not closing properly.
It is suspected to be caused by a Microsoft IPV6 issue. Those command lines can assist by disabling IPV6 in your system:
netsh int 6to4 set state disabled
netsh int teredo set state disabled
 On Win7 – you can also set the new advanced setting: net.disable_ipv6 = true that supposes to prevent it.
B. For improving low speed issues:
 Make sure your upload speed limit is correctly set as follows:
1a. If you have “Banwidth->Apply rate limit to transport overhead” enabled (recommended) –
set the upload limit to about 80-95% of your connection’s maximum upload-speed/cap.
This is required so to accommodate for 1) + 2) above, limiting the total of
upload-payload + download-acks-overhead
You can test your connection speed @ http://speedtest.net or use the options->setup-guide (control-G)
1b. If you have “Bandwidth->Apply rate limit to transport overhead” – disabled –
set the upload limit to 70-80% of your connection’s maximum upload-speed/cap.
This is recommended in this case, but not required, though.
You can set it to as low as the actual seeding-payload speed you like to have.
In both cases you can use a different upload speed limit setting at pref->bandwidth->”Alternate upload rate when not downloading”
Test your download speed again now with this (test torrent…) This step should be enough for most users that upgrade!
 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)
 Set pref.->advanced->bt.tcp_rate_control = false
 If you want to try and reduce your ISP’s throttling:
Some ISPs are more “sensitive” to UPD (uTP) traffic. You can reduce the use of uTP by –
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 choking / router issues:
 First, make sure you have set a proper upload speed limit (B.1 above) and that your max # of connections/slots are per the setup-guide
 Change setting per B.2a&b above
 Set your pref->advanced->bt.connect_speed = 5
 Set your pref->advanced->net.max_halfopen = 8
 Disable the DHT network
 In pref->connection – Disable NAT-PMP port mapping.
Make sure ‘uPnP port mapping’ is unchecked if you’ve manually forwarded you port in the router.
D. If you feel your multimedia player throttles your speed (Win7/Vista):
If you’ve noticed this strange behaviour (mostly with high speed connections) when running a player/recorder/streamer app –blame Microsoft… and modify/create this registry key:
Name : NetworkThrottlingIndex
Setting to – FFFFFFFF will make it not throttle .
Other values may adjust the amount per the above article.
E. For minimizing possible “privacy invasion”:
Pref->general->send details when checking for updates – unchecked
Pref->advanced->gui.report_problems – false (do not send crash reports)
Pref->advanced->gui.bypass_search_redirect – false (bypass BT inc search server when searching)
You may also look here for some more advanced methods
F. Bypassing known bugs:
1. Bug: After running for 22 days – uTorrent will not handle properly uTP connections (bad timer issue, relevant only for builds 21586 and below)
Bypass: Upgrade to the latest build, or close & open uTorrent at least once every 22 days …
2. For Win 7/x64 users – not being able to kiil uT process – see A[3-4] above …
3. Resetting Transfer Cap history – will not quit the “stopped” state , caused by the cap limitter. A bypass solution is here.
4. TBD …
H. For problems downloading the “help file” :
– Get the latest copy from here
– Extract to your settings *.dat files location
– Rename to utorrent-<version-#>-<build-#>.chm
For example – for release 2.0.1 build 19248 – utorrent-201-19248.chm
for release 2.0.2 build 19648 – utorrent-202-19648.chm