Its pretty harmless & can be uninstalled very easily.
From Leatrix Website
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 Star Wars, World of Warcraft, Rift, Aion, Warhammer, Lord of the Rings, and more.
System Requirements
Leatrix Latency Fix is supported on these operating systems only.
Windows 7
Windows Vista (SP1 or higher)
Windows XP (SP3)
Both 32-bit and 64-bit versions of Windows are supported.
Macintosh users should read the guide here.
Leatrix Latency Fix is written in Visual Basic and requires Microsoft .Net Framework 4 to be installed on your computer (most modern computers will have this already). If you don't have Microsoft .Net Framework 4, you can download it from here.
Some Third party Resource reference to Leatrix
Videos:
Latency Fix
How to fix lag
WarriorTSW.blogspot.com
Blogs and News Sites:
Amerence Love WoW
Resource Site Spotlight
Master of Warcraft
try it out yourselves to see if it helps reduce latency
http://www.wowinterf...LatencyFix.html
AS ALWAYS, i advise getting your windows 7 up-to-date with the "windows update" program and have a virus installed. /gg