Remember MS DOS?
I have a new computer (Win-XP), but I still keep my old one going (W98se).
I'm having troubles with my W98se one. Basically, Windows Explorer is not
functioning correctly... sometimes not at all! I've posted questions about
that, but the thread has been lost/deleted.
I'm hoping I can "skin the cat" another way... using DOS.

Q1. How do find out which version of DOS I have?
Remember I'm running Windows 98se.
Does that mean it must be using DOS X.X ?
Q2. Where can I find a DOS "refresher tutorial"?
I need to bone up on commands.
Q3. Is there a "directory tree" command... TREE or XTREE?

Thx
David