Thanks for your bug report. This has been reported occasionally in the past, however I have never been able to reproduce it myself. There are so many possible combinations of Windows configurations, background applications, and anti-virus/security software that could cause issues like this. That said, if you were experiencing a problem with all of your mIRC clients, and you then put your computer into sleep mode, and it then failed to restart from sleep mode ie. crashed, it sounds like something was already wrong somewhere and it would be difficult to know how to reproduce the same situation.
mIRC v7.37 actually added a check for sleep mode where it saves ini files immediately to disk when sleep mode is triggered, just in case something goes wrong with sleep mode. However, if there is already an issue with Windows or mIRC, for example due to low memory, it can be difficult to predict what will happen in this situation.
