I've just had an error message "an unexpected error occurred" pop up. Having restarted my computer and lightroom, when i opened it up again it's totally empty... all my images, folders and catalogues have disappeared... it even gave me a welcome to lightroom tutorial.
Has anyone had this?
I have loads of work on here and it backs up every sunday so i have a weeks worth of editing that has seemingly disappeared...
Help would be greatly appreciated
Check your "recent catalogs" entry in the File menu to verify that you are opening the correct catalog and not a new/empty one.
You are probably learning now that once per week is probably not a good backup schedule.
Lightroom has probably somehow opened with a new catalog. Go to File > Open recent, and see if your catalog is there.
Alternatively find the catalog file (it has the .lrcat extension) in Widows Explorer/Finder, and double-click it.
If Lightroom refuses to open the original catalog, it may have become corrupted (did LR crash?), and you would need to restore the most recent backup.