MSN Explorer..the one you speak of, I believe, was designed for XP only. Not designed for 2k, either. So you're attemtping to install an incompatible software based on OS.

You're wrong RoninCS:
MSN Explorer (latest)worked well under Win2K and Win98, before I switch to WinXP.

Go to MS' Explorer website and take a look. Explicitly lists that it's only installable under WinXP. If you're using it under other OS', then you may want to check the licensing agreement.

What are you talking about ? When I was under Win2k and Win98, I received a mail through Hotmail asking me wether I wanted to install MSN explorer or not.
I downloaded it and installed it, no prob. at all.
WinXP wasn't out yet, before months and MSN Explorer was there for a while (check the versions and updates we've seen...) ...
Talking about the licensing agreement (I didn't read it at that time), how do you explain what I've said above ?

I've installed the msn explorer in my friend's system. It worked fine.

Sorry, I forgot to mention the system details. My friend is using Win98

That's what I said, I didn't read the license agree., but I know MSN Explorer works just fine under win98/Me/2000/XP. With Hotmail, you have the opportunity to install it under any Windows.
Why it doesn't work under NT, I don't know, maybe it isn't meant to run multimedia apps., on the contrary Win2K is much more efficient for this part than NT, but that everyone knows this...
That's all folks !