Hi pasanjay,
To investigate the root cause, I will need to see your installation details. Can you copy and paste your installation details here. You need to go to MyEclipse > Installation Summary > Installation Detail. Also copy and paste your log file. If it is too large, delete the contents of the log file, and click on “Add/Remove Program” window and attach the .log file here for me? Your log file is located in [MyEclipse installation directory]\.metadata\.log