Just found a large file while defragmenting my hardrive. The DrWtsn32.log file holds about 400MB. That's a lot!
It is safe to delete this file?
After googling, I found out that the file was generated from Dr. Watson Windows XP application itself. It is a program error debugger that detects and diagnoses program errors and creates User.dmp and DrWtsn32.log files to contain the diagnostic data.
In Windows NT these files are stored in the %systemroot% folder. In Windows 2000, these files are stored in the %systemdrive%\Documents and Settings\All Users\Documents\DrWatson folder.
For Windows XP, these files are stored in the %systemdrive%\Documents and Settings\All Users\Application Data\Microsoft\Dr Watson folder.
The DrWtsn32.log file is appended each time a program error occurs; the User.dmp file is overwritten each time.
To turn off the Dr Watson debugger, apply the following Windows NT / Windows 2000 / Windows XP registry hack:
Key: SOFTWARE\Microsoft\Windows NT\CurrentVersion\AeDebug
Value: 0 disable
Value: 1 enable
To re-enable Dr Watson, you can change Auto back to 1 or from the command line type drwtsn -i.
For the conclusion, just delete DrWtsn32.log anyway. It's no harm whatsoever.