I don't know why but sometimes my script locks up for a few seconds and then I get asked to put in a password to unlock my mirc.

I do not have the option turned on in my options dialog whatsoever. Has any experienced this problem or know what it's happeneing? If I can pinpoint how this error happens I will re-post with more information.

That could be a trojan script. Check your Remotes and Aliases (Alt-R) and then View menu from both tabs to see if you have anything loaded that you don't recognize.