sorry to be a pain and very very boring, but somehow my computer has just decided to delete my dissertation while i was saving it. it was on my usb and ive been saving it as i go along, so i went to update it and it came up with loads of red crosses in boxes and stuff and then work shut down and i now its completely dissapeared from my usb.... im reallly worried as its my dissertation!!

is there any way i can find it??? ive tried searching etc.. but cant find it and when i open word and click on it on the right as last used documents it says that word cannot open it...

please help if you can

thank u very much

katie x