Shouldn't have Formatted shouldn't I?

If the set does not play then powering alone will not solve the issue as the processor is faulty. check and see if a reset can solve, if not the player must be connected to a PC and checked for error files/corrupt files , which must be removed formatted and re-installed.

This player shouldn't need a driver if your using windows it should recognise it as a general mass storage device and it should show up in my computer. Just transfer your MP3 files to the proper directory on the player. If you download videos to it they will need to be transcoded. WinFF or VLC
can do this. It can be a little tricky to transcode the video most of these players need an exact video file with the exact settings for the video and audio within the video file . AVS video converter will also transcode the video(free version leaves water marks) and may be easier to use.

It has a virus, could be, try reformatting the mp3 in dos, or better yet windows 98, simply the file system of you mp3 player is corrupted. after reformatting it in DOS mode, you can now reformat it in windows and then load songs.

I've had similiar problem on my M-25 MP3 player. You just have to try unplugging and plugging it again till the computer recognizes it.

freezing at refresh database means there is a wrongly formatted or corrupt file tht you are attempting to put on your mp3 player. to fix this you simply delete whatever corrupted file it is. i, personally, had to go to settings on the mp3 player and at the bottom of the list is "format", i had to format which deletes all ur songs but fixes freezing problem. u only have to do this if you dont know what song is freezing it. if you do know, then you can go into your mp3 file folder under my computer( removable E:) and delete the song from there or you can delete it from your mp3 player via windows media player. to be ensure tht it never happens again you should just put each song on 1 at a time, disconnecting it after every 1, if it freezes again you know what song it is and you can simply delete it. i know this seems like it would take 4ever, but having to go back through and reformat every sinmgle time this happens would take even longer, so just stick with it. hope this helps

Old post I know, but i had a similar problem...
I think it has to do with the file types you upload - had the same issue, and through trial and error I finally noticed one album I uploading was an m4a format. When I would upload several files stepwise, making sure that the player starts after each upload, everything would be fine until I tried the m4a files - it would freeze on the creating library startup screen. This was for the same model as billybraga. Annoying.

This means that your Library is corrupted and needs to be recreated this will not delete you *.omg files just you library.

Please delete your Library: Go to the Windows Explorer, and make sure to make hidden files visible (go to the Tools on the menu and click the Folder Options, then on the View tab, select the Show hidden files and folder.)
Browse to C:\Document and Settings\All Users\Application Data\Sony Corporation\CONNECT Player\Library and delete all the files located in this folder. Then, recreate a new library.

If your player freezes on "Building Library" (usually a result of putting certain type of .m3u playlists or too big images in id3 tag):

1. Turn the player off - you may need to take the battery out to do this.
2. Hold the menu button in.
3. Still holding the menu button in, press the power button.
4. Keep holding both buttons in until you get a dialogue asking if you want to format internal memory ... say yes.
5. Your internal memory will be formatted and you will now be able to start your X20.

Try to figure out what file is causing X20 to freeze - i've found that pretty much any .m3u file will make it freeze on building library ... only about 2-3 out of about 100 i've tried have worked.

the answer is to go to settings click on information and go to erase internal memory ....that is the way i fixed mine