Read Environment Variables in Autoexec.bat File (Windows NT/2000/XP)
When this value is enabled the variables declared in the Autoexec.bat file will be parsed and included in the current user environment.

Setting the Windows Temporary Directory (All Windows)
Depending on which version of Windows you run, temporary files are usually stored in C:\WINDOWS\TEMP. This tweak shows how to move the location of the temporary file directory.

Load Drivers and Programs into High Memory (Windows 3.1/DOS)
Programs and device drivers loaded from the AUTOEXEC.BAT file are normally loaded straight into low memory. This change allows them to be loaded high.

Remove Command Echoing (Windows 95/98/Me)
Normally when commands are read and executed from the AUTOEXEC.BAT file, there are echoed back to the screen. This setting turns the echo off, which means only message text will be shown, and not the originating command.