Buffer Overrun

Delete *.tmp, ~*.* and delete all Temporary Internet Files. Do a diskscan and a defrag.

Buffer overruns usually appear when memory is busy doing other things. Are you running more programs simultaneously? How much RAM in this computer? Did you add any new hardware/software recently?

You might want to click on Start --> Run --> MSCONFIG --> and choose selective Startup. Then edit the startup folder and remove everything but systray and explore (These two are required by WIndows to run -- the rest sits loaded in memory whether or not you use them). Unchecking other programs will give you more resources to work with and may eliminate the buffer overruns.