I talked to you about this issue myself on numerous occasion, in private or in here, I'm glad this is brought up again. It's unclear how often/much you use mIRC yourself, but I think you should really trust us in this case. This issue has been happening daily since I started using mIRC, and I only started in 2006, I'm sure it happened before. There is no need for a BSOD to get this to occur.
The typical step for people who report this on scripting channels is to simply turn off the computer with the switch, instead of using the standard way using Windows. Of course just doing this won't make it happen, but it's how users typically experience it.

Looking for a good help channel about mIRC? Check #mircscripting @ irc.swiftirc.net