All media players flickering and not playing any songs properly!!!

I am having this weird problem for many days now.
Whenever I am trying to play many mp3 files in WMP 11,it show media changing message and cycles through all songs very fast automatically without playing any one of them.I am unable to play more than one song.The WMP freezes sometimes.
I cant even create a playlist,it is constantly moving up and down like lines of programming.I cant really explain it in words.I hope u get the picture.
this is also happening with KMplayer,Media Player Classic,VLC.I am tired of this problem.
This is happening both in Vista and Windows 7 32-bit.

Wow. OK, so let me try to get this straight. You have a dual boot computer that loads either Vista or Windows 7. And then somehow, some days not all that long ago, you suddenly started having this problem and it exists on BOTH operating systems running media players. Is this correct?

Did you load any new software before this started happening? Perhaps installed some new codecs or other software that is related to media playback? Because if you didn't, this is most peculiar. You have two entirely separate operating systems suffering the same issue. The only other thing I can think of is that you managed to get a virus on your computer that is affecting both operating systems. Are they on one partition or separate partitions?