I am having trouble with my Dell laptop when I try a warm restart. I consistently get an error on loading HIMEM.SYS saying that the A20 line cannot be controlled. I tried following the advice from the Microsoft web site by adding the /MACHINE:x switch, but HIMEM displays an error on startup that the /MACHINE switch is not recognized. I know that the HIMEM.SYS that comes with Windows 95 is different than the one that comes with DOS, but I'm not sure which DOS version will make this work, if it will at all. Any clarification you can provide would be appreciated!