Random crashes

[Seravy]

My mugen sometimes crashes at random (happens in any stage, order, character, or mode, even on select screen), no error message, other than the usual (was access violation on win2k, xp doesn't display anything except the firewall asking for the built in debugger to be allowed). When it does, the BGM also stops and is replaced with some weird noise, so I thought it was related to music. So I changed all mp3s to ogg files today, installed the plugins for ogg, even removed the mp3 plugin line fro mugen.cfg, and it still happens.
Unfortunately, it happens about three times more often on my new computer (win XP, sound acceleration already turned off), than it did on the old one (win2k). It is now at the level where finishing the arcade mode is impossible as it usually crashes before halfway through the opponents. Any idea? Anyone who has no random crashes, or does this happen to everyone?

Also, if I do not click on the firewall window (and so make the postmortem debugger wait),but instead let mugen continue after the crash, mugen keeps running properly. It also seems to get the music back on the next stage. (If I do click on the window, mugen gets closed)

[Mineko C. Lucky]

I've experienced the similar problem in Windows XP. MUGEN justs crashes with a blank screen but the music just plays and you can hear characters punching and kicking. Then once the battle finishes, MUGEN closes by itself without any error message.

I have no idea apparently. I do know that MUGEN worked perfect on my Vista.