Hi,
Can you boot up to a Command prompt or Safe Mode command prompt, (different than
Safe Mode)? Hit F8 during/after boot self-test and try. Does your laptop have a
working floppy drive and did you try using the emergency boot disk? Get one at bootdisk.com.
You probably need to replace the config.sys file which contains the DEVICE=C:\WINDOWS\HIMEM.SYS
command line and verify the himem.sys file is in the windows dir.
hth