Abstract 1. Introduction 2. Conceptual Model and Research Hypotheses 2.1 Existence of Compatible Software 2.2 Pace 01 Upgrade In MS-V\Iindows 2.3 Expertlse in MS-Windows 2.4 Switching Costs and Intention to Stay wlth MS-Windows 3. Research Design 3.1 Product 3.2 Questionnaire Development and Data Collection 4. Results 4.1 Measurement Model Results 4.2 Structural Equation model Results 5. Discussions and Conclusion References