If you know roughly when the CWS appeared, try the system restore tool and go back to a point before the critter got to you. I did this once and it worked well, but I knew when I caught the bug within a couple of hours on a certain day.
It appears that you have a newer variant of the CWS that the shredder isn't equipped for. Make certain that you have updated the shredder to the latest version. Check back for new updates every few days. If it is a new strain, chances are they'll include it in a upcoming update.