A "visual bell" replaces the standard beep (like when you hit escape a few times) with flashing the Vim window. To stop this, do a:
:set novb
For the new-comers, you might want to hit the
:help vb
Note that this will revert to its default setting when you start vim again. So, you might want to set this in your gvimrc file. For details, do:
:help gvimrc
Helpful links:
- Vim Home
- Vim Documentation - useful for looking up the Vim manual
- My vimrc file (written on Windows 2K/XP but works on Linux too)