Update your Sage with the Latest Version (Sage 50 2018.2):
Open Services section of your Sage software and then select Check for Updates.
Now, select the download link. Here, you need to update sage to the latest version i.e. 2018.2.
Direct to the installation file, double click on it to run the installation process. You should have had log in with administrator rights to run this file.
For Windows 8, remove all compatibility settings.
Regards,
J Wick