WTF: Blinking C:\ In task bar after joining channel

[VaginalCream]

Has anyone seen this? As soon as Invision joins a channel, I start getting a blinking C:\ Icon in my taskbar, eventually the whole system hangs.
It's only Invision doing this, a straight version of mIRC is not doing it.
All other programs working fine. This just started happening out of the blue. Any help appreciated.

[VaginalCream]

Found how to fix it. It was only doing this while the file server was ON.
So I looked in the fileserver settings, and where it says rebuild index every ____ minutes, somehow it was showing 360. I changed it to 60 minutes and the problem stopped immediately.