Error 1721 there is a problem with the Windows Installer package or .Net Framework 3.5.1 is not installed when installing Sage 500 client on Citrix\Terminal services
Description
This can also occur if the .msi file is used for the installation process instead of the setup.exe when the prerequisites have not been installed. For example, if the c++ Runtime distributable files are not installed. If there is a need to run the .msi then run the separate prerequisite installation programs to load the C++ components and .NET prior to running the .msi installation. The setup.exe or autorun will attempt to install the prerequisites as part of the install process.
Cause

Resolution
[BCB:4:Operating system warning:ECB]

Verify .NET 3.5 is enabled

 Open Start, Control Panel, Programs and Features. Select Turn on Windows features on or off from the left panel. Enable Microsoft .NET 3.5.1 is enabled.


1. Download the installation file from the web site but do not launch it
2. Uncompress the file using 7z or other compression program
3. From the Start menu right clink on the Command Prompt and select Run as Administrator
4. In the command window, if this is Citrix enter "change user  \install"
5. Move to the folder where the installation files are located execute Setup.exe

The installation should proceed normally.

If installation still fails try disabling Microsoft .Net 3.5 Framework under Start, Control Panel, Programs and Features. Then, reboot machine.  Proceed to login into machine using local adminstrator account. From the Sage 500 installation folder, under the Client folder, locate the VCRedist subfolder. Run the vcredist_x86.exe to install the Microsoft Visual C++ runtime library files. After that is complete, then from under the Client folder, run the Sage 500 ERP 201x Client.msi install or the setup.exe 

Defect ID
Steps to duplicate
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