If the module already exists in the list of modules:

Refer to Related Resources:  "How do I enter product registration information for Sage 100 ERP? (change registration on information on installed module or during install) "

If the module has not been installed and is not included in the list of Installed Applications. Install the module from the Sage 100 ERP CD or downloaded media:

For Sage 100 ERP pre-2013 version:

1. From the server where the original installation was performed, insert the Sage 100 ERP CD or access the downloaded image 
2. Click Autorun.exe if auto start does not open
3. Select Sage 100 ERP Product to install
4. Select Maintain or update the instance of this application selected below: option
5. Select the instance under the Display Name then click Next
   • If the Existing Installed Instances Detected message does not open , InstallShield is not recognizing this machine as the original installation location
     • If the original installation was started from a different computer.  Try running the installation from that computer.
     • If still unsuccessful, Sage 100 ERP will need to be reinstalled to a different location.  Refer to Related Resources:  "How to move Sage 100 ERP to a different server, hard drive, or directory"
6. Click Add and click Next.
7. Select Yes to dialog, "Do you have a new Product Key?"
8. Enter the new Product Key
9. Click Next. All new modules are selected automatically if they are part of the Product Key but have not been installed.
10. Click Next twice. Click Finish.
11. Open Sage 100 ERP and activate the new modules for each company as needed.
    

For Sage 100 ERP 2013 and later:

1. From the server where the original installation was performed insert the CD with Sage 100 ERP installation files or access the folder where the Sage 100 ERP installtation files were downloaded
2. Click Autorun.exe
3. Select the Sage 100 ERP Product installed
4. Select Next
5. Enter the Administrator password to maintain the current install
6. Click Next
7. Select Add Module
8. Select Yes to the dialog, "Do you have a new Product Key?"
9. Enter the new Product Key
10. Click Next
11. The Module Selection screen will appear
    • All new modules are selected automatically if they are part of the Product Key but have not been installed
    • Make any needed changes
12. Click Next
13. Click Next
14. Click Finish
15. Open Sage 100 ERP and activate the new modules for each company as needed