Every so often my computer locks up and an error message appears."An exception OD has occured at 0028:C10697BF in VxD ESD1_506(01) + 00001273. This was called from 0028:C5881ED3 in VxD L+MDM3(01)+ 00031EC7". I have to shut down the computer and start over to get it to work. It is a 233MMX with windows 95.