I am not an expert on the technology, but the hard drive that you copied the file from might have been partitioned with the NTFS file system (if computer A is running Windows XP or Windows 2000, as far as I know, that hard drive is using the NTFS file system and is not compatible with the FAT file system). If computer B is using Windows 98, it is probably using the FAT 32 file system (maybe even FAT 16). The computer I'm using now is one that I found in the garbage and was running Windows 2000 but was locked up with passwords and would only show a security window asking for an entry password. I even booted up a commercial rescue cd, but it still couldn't recognize that there was a hard drive in the computer because it was an NTFS hard drive and the rescue program only recognized the older FAT file system. I had to connect a second hard drive (daisy chain) that booted up Windows 95 and had a special technicians program to re-partition it to FAT 32. Windows 98 has a FAT conversion utility from FAT 16 to FAT 32 in ACCESSORIES, SYSTEM TOOLS (it doesn't cover NTFS, but something similar might exist in 2000 or XP that does convert NTFS and FAT, but be very careful because as far as I know, they are completely incompatible). Check the Microsoft update website for a program that might be able to convert your floppy or CD to be read by both file systems. Also check the Adobe Acrobat website for a universal reader program (I never heard of one, but it's worth a try).