For the past couple of

For the past couple of weeks, every second time I run something from the start/run button such as “c:\temp” I get the message “Explorer has generated errors and will be closed by windows. You will need to restart the program. An error log has been generated.” Any one had anything similar (note that this always happens every other time I run the command, usually resulting in explorer bombing out and recreating the shell again. I also need to find this log file it is generating.