Why isn the drawing date and time updated in Explorer when a drawing is saved?
This issue is currently under investigation, and is isolated only to the Win95B operating system environment (it does not occur under Windows NT or Win95A). As a workaround, you can set the ISAVEPERCENT system variable to 0 in AutoCAD R14. This forces AutoCAD to write the entire contents of the drawing during each save. This can slow the save process, but the file date will be listed correctly.