Have consistent ways to define course titles, students, trainers, classrooms, equipment, and so forth. Identify the exceptions. Verify imported data and make sure it matches new standards . Otherwise, you will be generating the old mistakes into the new application. Enforce your standards.
Diskettes can be defective.
You may not have enough disk space to load the new application. There may be conflicts between applications. Equipment must also be installed. Sometimes the installation of the hardware must be coordinated with the installation of the software. Windows programs often require more memory, a mouse, a better monitor, or maybe even a CD-ROM drive.