Automatically run a script when I log on to Windows

You can create a scheduled task that will run when your computer is unlocked:

1. Start > Administrative Tools > Task Scheduler
2. left pane: select Task Scheduler Library
3. right pane: click Create Task... (NOTE: this is the only way to get the correct trigger)
4. in the Create Task dialog:
   • General tab -- provide a name for your task
   • Triggers tab -- click New... and select On workstation unlock
   • Action tab -- click New... and click Browse... to locate your script
   • Conditions tab -- uncheck Start the task only if the computer is on AC power

Also, I tweaked the path in the script to read

echo %USERNAME% logged on at %DATE% %TIME% >> %USERPROFILE%\log.txt