Explorer.exe crashes when opening "my music" SP2

I have been having trouble opening my "my music" folder. It contains about 8.5gb of music, which I cannot directly access. I can see the music and select it when I go to open file on Winamp or Media Player and it will play normally. However when I double click on the "my music" icon everything stops and I get a message saying explorer.exe has failed and needs to end. There are a few other details I can copy if necessary. Straight after this has happened I then get an error saying Dr Watson debugger has failed and needs to end. It only seems to be this folder that has problems. It happened a couple of months back but I don't know what I did but it stopped. It is getting annoying as I can't transfer music onto my MP3 player any longer without opening "my music ".
Sometimes explorer restarts and sometimes everything freezes and I have to reset the computer.

Any help would be appreciated.

Thanks
Alex