dvd decoder software?

Oops... I meant VLC, not VNC (which is a networking software to remotely take control of computers).

WinDVD should work, and if you are seeing a picture, it is decoding properly.  Your 1.8GHz cpu is more than sufficient, but what video card are you using?  If it's too old, it can slow down playback.  Make sure your DVD drive has DMA enabled, also.

Here's a free one that adds some junk in the background (you can go right into add/remove programs and take off the extra).  I didn't really care for the interface, but it works:
http://www.cliprex.com/

Here's another one, with a slightly better interface:
http://www.ngksoft.com/sp/index.html

Probably the best interface of these three, again supported by adware, just take it off immediately.
http://www.npssoftware.com/allinonemediaplayer/index.htm


Here's the one I actually use:
http://www.videolan.org/
Totally free, works well,

VLC - the cross-platform media player and streaming server is a highly portable multimedia player for various audio and video formats (MPEG-1, MPEG-2, MPEG-4, DivX, mp3, ogg, ...) as well as DVDs, VCDs, and various streaming protocols. It can also be used as a server to stream in unicast or multicast in IPv4 or IPv6 on a high-bandwidth network

YMMV, I liked VLC the best.

I'd suggest not to ever install any adware supported software, for they to often come with some malware too (info stealers or trojans horses), Gator being one of the most well known.

Also boofulls windows medis player 10 if you are running xp works an almose all DVD's try that and see

Check your dvds.  Most dvd's I have, come with software to watch the DVDs. If its still slow, I would have to agree with Callandor that your video card may be old

try powerdvd

Try Vlc or windvd or power dvd

I sugest u to ry vc it's free and very useful!!!

-----> http://www.videolan.org/vlc/download-windows.html

regards

Artadj

That's what I said right of the start :)