Individual's response to anything related to the immediate context can form attitudes concerning the learning situation where the language is taught. As an attempt to shed new light on the issues relevant to attitude, this study investigated the extent to which a Computer-Assisted Vocabulary Learning (CAVL), Mandegar, can improve learners' perceptions about the program. To fulfill the aim, eighty first-grade high school learners, divided as control and experimental groups, were randomly selected. Two questionnaires, in the first and last session adopted from Altiner (2011) and Bulut & Farhan (2007) respectively, were administered to the participants to investigate their perception to use CAVL in the future. The results, obtained using Paired Samples T-Test (p = 0.002 < 0.05), revealed a significant difference between CAVL users and nonusers in favor of the experimental group. Students in the experimental group showed a positive attitude toward CAVL and perceived its utility for helping them speed up vocabulary learning. The present finding might have important implications for decision makers and teachers to further involve Computer-Assisted based programs to increase Language learning.