Detected Dropped Samples - log or timestamp?

In that case it's possible that there are interruptions when writing to the temp file. Audition records to a temp file in Waveform view, and the final file isn't created until you do a Save - which saves the latest version of the temp file. By default the temp file is located in a place where your OS can get at it, and for some strange reason it seems to think that it has priority access rights...

Two things: Firstly it's a good idea anyway to relocate the temp file in a fresh directory of its own, ideally on a different drive. An external USB one is fine, as long as it remains connected whilst you are using Audition. The second thing is actually a better solution, and is in fact the recommended one - record in Multitrack view. The reason that this is a better solution is that your input is written directly to the final file - no intermediate steps at all. You can even make recoveries from it if you have a crash - very little chance at all of this happening in Waveform view.

All of the foregoing assumes of course that you don't have a faulty (or going faulty) hard drive in your machine. They have got a lot better over the last few years from this POV, but if there's any doubt at all, then run chkdisk on it. For more information about this, do a google search using the search term 'checking hard drives for errors'.