Hello and good day to everyone , it's a pleasure to join and be part of this forum.

My problem is this , whenever I try to play downloaded files I keep on getting the below error :

Error 2048 : Could n't open the file because it is not a file that quicktime player understands.

How do I correct this problem ? Thanks very much.

Which OS are you using & which client (LimeWire, Phex, BearShare, FrostWire etc)?
Try LOTR's advice here: Playing back movies in various formats

If you are using Mac OSX & like using QuickTime player, check this list also .avi ~ sound but no video in Quicktime (Click on blue link). I highly recommend Perian plug-in codec, and also VLC & MPlayers just in case. MPlayer I'd recommend the OSX beta version. Depending on the file, some I set to open with VLC, some with MPlayer, some with QuickTime Player.

Thanks guys ,but I am using windows XP.

You can use VLC player with XP - I do. Check out the link that I gave you in post #2... it has a further link for downloading VLC. VLC is a free media player, with codecs built in to play most file types. If VLC can't play the file, chances are it's a bad file.

You still haven't told us what client you're using, or even what file format you're trying to play

One month ago and still the problem has not been solved . . . is there a simple yea or nea solution anyone ?

Problem : Downloaded files will not open or play in itunes .

Simple answer : what's the problem and how is it solved ?

Thanks.

Beware of downloading spam files. Many many people have complained about files not playing & it turned out the files were spam files; Virus thread: Typical virus spam file sizes - Make a note of them (click on blue link to see)

I am sorry but I really need some help I am not very good with this kind of stuff but I have been trying for over an hour to put in my post with all of the required system information how do you do it
Please

If I were using a windows computer I'd tell you. Someone else could advise you.