Problem with offset command in Autocad9LT - I have the same 64 bit version of AutoCAD 9 LT on 2 identical Compaq CQ5814 computers. Each is running Windows 7 64bit and each has 6gig of memory. I have used  this version of AutoCAD for over a year. Both operated fine until recently on one computer, each time I try to use the OFFSET command (by icon or by typing command) as soon as I try to insert a number for the offset and enter, the drawing is exited back to desktop. It only happens on one computer. This computer had worked fine until recently. I think some other program has an interference with the CAD command. How do I find out which one? I can delete programs one at a time to see which one has the interference but this is a long process. Any HELP?