When i run Sage 50, there is an attention of "require more hard disk"

SUGGESTED

I am a student who will learn how to use Sage 50 to make record.

I have installed the program using the document from my teacher, and try to run a sample company, when the processing of backup, the waring attention appear "The program requires more hard disk space before it can convert your date to the new version".

I have cleared almost 40G space in C disk, my computer system is Windows 7.