So you are trying to install a copy of windows from a cd that you burnt from a download of the os, you got form the web somewhere?
I would think the biggest chance of causing the error, is either the copy of the OS you downloaded or the burn of the CD.
When exactly are you getting the error? just after the DOS mode part of the installation? The otehr thing you could do is create a msdos bootable usb (thats large enough) then copy the I386 from the windows installation CD on to it..then boot your laptop form the usb, copy the file over then run the winnt32.exe i think it is. And see if you get the same error.