hello, last night when i switched off my laptop it was full of music, pictures and writing. today, i switched it on and it was all...GONE. :*(

it looks like my laptop has reset itself back to how it was when i first got it. the screensaver has reverted back to the dell stock one and all my bookmarks have gone as well as everything in my music and my pictures.

i think this has happened because i kept on getting low on disk space messages but does anyone know if i can get the stuff i lost back and how??

any help would be much appreciated.