elegantlywasted; I'm just going to point out the obvious that someone can't go round forever with their remote and perform off, it makes much more sense to help solve the issue than just tell them to turn stuff off.
Slade; Their are I suppose, two reasons this would happen, you either have some sort of script that was installed, a bit like a 'virus' shall we say, or, you have installed a script yourself and this is its function. However, in both cases, You can very easily unload scripts from your mIRC following the simple steps;
1. Press ALT + R (alternatively, goto; FILE - TOOLS - Scripts Editor)
2. Goto VIEW - and select the file you wish to unload, if you want to unload everything, skip this stage.
3. To unload a file, goto FILE - UNLOAD - continue this until the 'page' in front of you is blank if you wish to unload all scripts, or just use as required.
Eamonn.