If you have a Windows Server O/S chances are by default you are using Data Execution Prevention (DEP). The main Medilink executable MPW2000.EXE needs to be excluded from this in order for it to run.
Open Explorer and right click This PC and go to Propertier OR go to Control Panel -> All Control Panel Items -> System
Advanced System Settings
Performance Section -> Settings Button
Data Execution Prevention Tab
If Turn on DEP for all programs and services except those I select
Add C:\MEDILINK32BNT\BIN\MPW2000.EXE (or whereever your Medilink is installed).