My computer has a Win98+XP dual-boot system. Recently I spent a summer vacation learning DOS, and now I want to study it further. But the DOS version that comes with my Win98 is too low (4.0), so I want to install a higher version. Which version should I install, and how should I install it? After installing it, will it cause any harm to the original two systems? Could all you experts please give me an answer? Thanks in advance.



