Software exception (0xc0000005) on Shutdown

Hi, I have Windows Vista Business 64-bit, and everytime I try to shutdown, at least six programs throw this exception.
I did a quick search and a couple people back in January had the same problem.
I'm using a Lenovo ThinkPad and at least three of the programs are Lenovo-related. The two other programs are RoboForm, which functions perfectly minus this exception, and RivaTuner, same as RoboForm, works like a charm but throws the exception on system shutdown.

Can anyone explain this? I went into the Event Viewer > Windows Logs > System and Ctrl+F for TPONSCR.exe (ThinkPad Onscreen Display) and found the actual error:

Application popup: tpvolbar: TPONSCR.exe - Application Error : The exception unknown software exception (0xc0000005) occurred in the application at location 0x02549080.

Click on OK to terminate the program

All the errors are the same, except the memory location (obviously).
It doesn't really disrupt anything but it is rather annoying everytime I shutdown my system.
Thanks for the reply.

0xc0000005 just means "access denied", but in this case it's referring to wild memory writes, not necessarily permissions in the file or registry sense. The fact that you're using the word "throws" in conjunction with exceptions suggests to me that you may already understand the mechanism

It's almost impossible to guess why the crash is occurring based on those data alone, so you might want to start by first updating all of those applications. Perhaps newer versions contain fixes.