User Agent

Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; WOW64; Trident/4.0; .NET4.0C; .NET4.0E; .NET CLR 2.0.50727; .NET CLR 3.0.30729; .NET CLR 3.5.30729; Tablet PC 2.0; MAXTHON)

This user agent belongs to Maxthon. Maxthon International Limited developed this Browser. This Browser run on WinXP and it renders web contents with Trident on Windows Desktop.

Browser - Maxthon

Maxthon

Version2.0 @ 32 bit
DeveloperMaxthon International Limited
ParentMaxthon 2.0
Platform windows 5.1 (32 bit) by Microsoft Corporation
Device TypeDesktop

Act as 

Mobile No
Tablet No
Crawler No
Fake No
Anonymized No

Capabilities

Rendering EngineTrident by Microsoft Corporation (For Internet Explorer since version 4.0 and embedded WebBrowser controls (such as Internet Explorer shells, Maxthon and some media players).)
Pointingmouse
Javascript Yes
CSS Yes Version: 2
Cookies Yes
Tables Yes
Frames Yes
IFrames Yes
Background Sounds Yes
Java Applets Yes
VB Script Yes
Activex Yes