Incorrect file associations could be the result of underlying issues within your PC system. As such it is highly recommended to scan your PC for invalid registry entries, unused processes and other unfavourable system settings to identify slowdown issues.
The EVZ file type is primarily associated with 'EasyViz' by Medical Insight A/S.
EasyViz is an image distribution system and clinical image viewer.
EasyViz works with any modern PACS archive and EMR system.
EVZ files are used for EMR integration between any EMR and Medical Insight's EasyViz Radiological Image Viewer system.