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Updated: 10-28-12 05:16 AM
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Warlords of Draenor Pre-Patch (6.0.3)
Warlords of Draenor Pre-Patch (6.0.2)
Siege of Orgrimmar (5.4)
Escalation (5.3)
Updated:10-28-12 05:16 AM
Created:05-23-09 01:32 PM
Downloads:3,240,530
Favorites:1,515
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Categories:Leatrix Projects, WoW Tools & Utilities
6.0.3
Leatrix Latency Fix  Popular! (More than 5000 hits)
Version: 3.00
by: Leatrix [More]
A latency fixing program by Leatrix
Click here to lend your support!
What does it do?

Leatrix Latency Fix will reduce your online gaming latency significantly by increasing the frequency of TCP acknowledgements sent to the game server. For the technically minded, this is a program which will modify TCPAckFrequency.

You will see reduced latency in many online games including World of Warcraft, WildStar, Heroes of the Storm, Elder Scrolls Online, Guild Wars 2, Diablo 3, Star Wars: The Old Republic, Rift and more.

Note that Leatrix Latency Fix performs a different modification to the 'Optimise Network for Speed' setting in World of Warcraft. They are not the same thing and can be used together (more information on this in the FAQ).

System Requirements
  • Windows 7, 8, 10, Vista (SP1+) or XP (SP3).
  • Both 32-bit and 64-bit versions of Windows are supported.
Macintosh users should read the guide here.

Installation Instructions

You can watch a short installation video here.

Simply download the zip file, extract it and then run Leatrix_Latency_Fix_3.00.exe. When the program launches, click the Install button. You will see the status change from 'Not Installed' to 'Installed'. You need to restart your computer (or disable/enable your network card) for the changes to take effect.

Your Windows account needs to have Administrator rights in order to install or remove Leatrix Latency Fix. If your Windows account doesn't have Administrator rights, you will be prompted for the credentials of an account that does have them.

After Leatrix Latency Fix has been installed, you can login to your online games with reduced latency!

To uninstall Leatrix Latency Fix, click the remove button and restart your computer.

For reference, the status line in the program will show 3 possible tags. 'Installed' indicates that all network interfaces have been modified for reduced latency. 'Not Installed' indicates that no network interfaces are modified for reduced latency. 'Partially Installed' indicates that some network interfaces have been modified for reduced latency. You will see this status tag if you add a new network card (or perhaps a USB modem) after the installation of Leatrix Latency Fix.

Errors and Unexpected Behaviour

If you have any problems with the program, please click here to send me a message. Include your operating system and service pack as well as any relevant information (such as error messages). You can also try version 2 if you prefer (available here). Version 2 requires the Microsoft.net Framework (available here) but the mechanics are identical to version 3. You can watch a short installation video for version 2 here.

If you are having problems downloading from Wowinterface, please use this link on Dropbox (this link is subject to change so please don't share it elsewhere).

More Information

There is a FAQ covering pretty much everything here and there is a short installation video tutorial here.

To ensure that people always use the genuine Leatrix Latency Fix program, please don't publish it elsewhere. It's completely free so there is no need to. Please link to www.leatrix.com instead.

Links

Some official and unofficial videos and websites referencing Leatrix Latency Fix are listed below. If you have made an honest webpage or video featuring Leatrix Latency Fix and you would like to see it listed here, just send me a private message.

Official Leatrix Sites
Unofficial videos featuring Leatrix Latency FixLinks, fansites, nice people and interesting thingsMore

Visit Leatrix.com for genuine Leatrix software.

Leatrix software is protected by copyright and is ONLY hosted on Leatrix.com and Wowinterface.com. Files hosted anywhere else are NOT genuine and could contain viruses. Stay safe online and use only genuine Leatrix sites.
3.00
  • Leatrix Latency Fix 3.x is written in Python.
  • The Python configuration files are bundled with the download.
  • Integrated Microsoft User Account Control and Administrator rights detection.
  • This update is recommended for new users but optional for existing users.
2.0.2.0
  • Updated exception handling.
2.0.1.0
  • Simplified the code structure.
  • Restarts are no longer done for you so that you can choose whether to restart your computer or network card.
2.00
  • Leatrix Latency Fix 2.x is written in Visual Basic (Microsoft .Net Framework 4 required to run).
1.23
  • Updated the restart process.
1.22
  • To avoid confusion, unknown interfaces will no longer be listed in the checker script.
1.21
  • The checker script will now show network interface names and identify virtual or DHCP addresses correctly.
1.18
  • The checker script will now show IP addresses for the network interfaces which have been modified.
1.15
  • You can now run Leatrix Latency Fix from batch files using 'cscript <script name.vbs>' (eg. 'cscript c:\install.vbs'). Administrator rights are required for this.
1.12
  • Added a checker script which will inform you whether Leatrix Latency Fix is installed or not.
1.11
  • Added support for Microsoft's User Account Control.
1.00
  • First release.
Archived Files (1)
File Name
Version
Size
Author
Date
2.0.2.0
383kB
Leatrix
10-22-12 12:51 PM


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Unread 09-08-09, 07:03 AM  
Recondor
A Kobold Labourer

Forum posts: 1
File comments: 6
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I went from 200 to 50 stable

Windows 7 x64 beta
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Unread 09-08-09, 06:58 AM  
GOSYDELIX
A Flamescale Wyrmkin
 
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Forum posts: 112
File comments: 58
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from 130ms down to 30ms stable.. that's just fu**ing awesome.
Big creds to ya mate!
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Unread 09-08-09, 06:46 AM  
Seth
A Kobold Labourer

Forum posts: 1
File comments: 12
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Before: 200-300ms
After: 70-90.
Thanks
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Unread 09-07-09, 04:52 PM  
wazer
A Kobold Labourer

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File comments: 2
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Thanks its amazing!

First of all this vbs script rocks..

I was wondering if you had the time to make a silent vbs script aswell ?. Because i reformat alot and i want everything to silent so that would be awesome if you took the time to do that aswell..

Again thanks for the fantastic script
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Unread 09-01-09, 11:20 AM  
Relic Kylias
A Kobold Labourer
 
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I simply cannot thank you enough. From 140-500+ down to 60-80. Amazing.
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Unread 08-22-09, 03:51 PM  
neze
A Deviate Faerie Dragon

Forum posts: 17
File comments: 6
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from 380-450 To 270-350 and sometimes less.
Windows Xp Sp2
Thank You!
Last edited by neze : 08-22-09 at 03:53 PM.
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Unread 08-19-09, 08:01 PM  
Pikarya
A Kobold Labourer
 
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Forum posts: 1
File comments: 11
Uploads: 0
From 256ms to 96ms. I love you. Seriously.
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Unread 07-15-09, 10:05 AM  
shkm
A Chromatic Dragonspawn
 
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AddOn Author - Click to view AddOns

Forum posts: 186
File comments: 98
Uploads: 7
The difference when using this script is incredible. I've wholeheartedly recommended it to my entire guild. Thank you!

Actually, just realised that you mentioned Blackrock Syndicate. That was my post .
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Quit WoW again on 17/04/2014.
Last edited by shkm : 07-23-09 at 09:29 AM.
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Unread 06-12-09, 03:00 AM  
Eewokney
A Kobold Labourer

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File comments: 1
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ms

went from 270 to 20 lolz both in dalaran
Last edited by Eewokney : 06-12-09 at 03:01 AM.
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Unread 06-11-09, 10:20 AM  
Abelius
A Defias Bandit
 
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Forum posts: 3
File comments: 21
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Talking OMG!!!

I've also tested it with FastPath activated... It dropped to an incredible latency value of 34ms!!!!

So I practically went from 175ms to 35ms with these two easy steps, which is even good enough to kick some ass at FPS's as well in WoW.

I cannot understand how I lived without these until now! Thank you!
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Unread 06-11-09, 08:45 AM  
Psychophan7
A Chromatic Dragonspawn

Forum posts: 153
File comments: 47
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While running around Dalaran...
Before: 350ms
After: 130ms
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Unread 06-11-09, 03:14 AM  
Elariah
Premium Member
 
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Premium Member

Forum posts: 18
File comments: 67
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Yeah a very good fix. I forgot about this setting in the registry for ages! Reduced my latency from 160-300 to no more than 30-45 now.
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Unread 06-10-09, 08:46 PM  
Caladell
A Kobold Labourer

Forum posts: 0
File comments: 2
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Thanks for this! Noticed quite the difference on both my computer, and my wife's. Also noticed smaller pings in Team Fortress 2.
Anyway, old ping: typically 200-250, with it going up to 500 some times
New ping: 55-70, and much more consistent speeds
OS: Vista 32 SP1
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Unread 06-10-09, 03:34 PM  
Khuul
A Murloc Raider

Forum posts: 9
File comments: 2
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Originally posted by Leatrix
This sounds like a Windows corruption issue.

Click Start > Run, enter regsvr32 VBScript and click Ok.

You should receive a message that it succeeded. If so, try the script again.
Thanks for that, tried it again and worked fine

Before: 150-250
After: 70
OS: winxp sp3
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Unread 06-10-09, 11:52 AM  
Skylinee
A Murloc Raider

Forum posts: 5
File comments: 371
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Allright, enough whining from me. Old ping: ~250ms, new: ~40


Thanks for this, i really missed this fix since i switched from XP to Vista.

Edit: OS: Vista 64 Home Basic 64bit
Last edited by Skylinee : 06-10-09 at 11:52 AM.
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