Hi Junt:
I'm just checking to see if you were able to solve your problem? If you are still experiencing difficulty, some additional information would be helpful.
What version of Windows Vista are you running (eg. Home Basic)?
What language is your operating system?
What is your user name?
Does the error occur during startup, or sometime afterward?
If the error occurs during startup, do you get any other errors. For example, any errors about loading plugins? Can you see on the splash screen if Multisim has stopped after while loading a particular plugin?
Garret