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Sorry Ajay Mondal you had this error, Please answer the following questions to help me answer your question<br />
What is the operating system?
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Sorry Ajay Mondal you had this error, Please answer the following questions to help me answer your question
What is the operating system?

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The Symbol MC70 runs Windows Mobile 5.<br />
<br />
Try the download again. &nbsp;It may have got corrupt during the download (this does happen with Microsoft downloads occasionally).
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The Symbol MC70 runs Windows Mobile 5.

Try the download again.  It may have got corrupt during the download (this does happen with Microsoft downloads occasionally).

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Thanks everybody...<br />
Now I am trying.<br />
After Sometime i will give feedback.
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Thanks everybody...
Now I am trying.
After Sometime i will give feedback.

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Experts recommendation to disable security settings on phone.<br />
<br />
This corresponds to the error message being received. &nbsp;Alas questioner has not confirmed that this method has not worked but I believe this is a valid solution.
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Experts recommendation to disable security settings on phone.

This corresponds to the error message being received.  Alas questioner has not confirmed that this method has not worked but I believe this is a valid solution.

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When try to download and install .net compact framework(NETCFSetupv35.ms<wbr /> file) give error:<br />
The file '...' cannot be opened. Either it is not signed with a trusted certificate, or one of its components cannot be found...<br />
How to solve this problem.
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When try to download and install .net compact framework(NETCFSetupv35.ms file) give error:
The file '...' cannot be opened. Either it is not signed with a trusted certificate, or one of its components cannot be found...
How to solve this problem.

DotNet compact framework 3.5 installation error on symbol mc70 pocket pc

The .NET Framework is not specific to any one programming language; rather, it includes a library of functions that allows developers to rapidly build applications. Several supported languages include C#, VB.NET, C++ or ASP.NET.

.NET Programming

Installation is the act of making a computer program program ready for execution. Because the process varies programs often come with a specialized program responsible for doing whatever is needed for their installation. Installation may be part of a larger software deployment process. Cross platform installer builders that produce installers for Windows, Mac OS X and Linux include InstallAnywhere, InstallBuilder and Install4J. Installers for Microsoft Windows include Windows Installer, InstallShield, and Wise Installation Studio; free installer-authoring tools include NSIS, IzPack, Clickteam, InnoSetup, InstallSimple and WiX. Mac OS X includes Installer, and also includes a separate software updating application.

Installation

A personal computer is a general-purpose computer whose size, capabilities and price make it useful for individuals, and is intended to be operated directly by an end-user with no intervening computer time-sharing models that allowed systems to be used by many people, usually at the same time. Personal computers may be connected to a local area network (LAN), either by a cable or a wireless connection, and through that to the Internet. A personal computer may be a laptop computer or a desktop computer running an operating system such as Windows, Linux or Macintosh OS.