Help somethings wrong with my laptop's start up?

i connected an mp3 through a USB cord and everything was normal, then after about an hour and my screen says "Windows has failed to start" and it sais it's due to a recent hardware or software change. then a startup repair thing comes up saying that it can fix the problem, but it doesn't fix it when i launch it. I can't even log in to my computer, it also says that if i have connected a device, which i did, that i should disconnect it, which i also did, but it keeps saying the message even though nothing is connected. The device I connected was a 4GB RCA LYRA mp3 player. restarting doesnt do anything either. help me please please please

Help somethings wrong with my laptop's start up?antivirus scan

what does it have

Help somethings wrong with my laptop's start up?computer security

I suggest removing the mp3 player and then do a system restore to the first available date before you installed the player. You should start in safe mode by hitting F8 while starting and click safe mode. Then Start-All Programs-Accessories-System Tools-System Restore. Pick date and follow instructions.

Hope it helps.
Your MP3 Player IS THE PROBLEM Disconnect if from your computer and restart it. The problem is in your MP3 Player for some reason!!