Spent two hours last night working on a series of scans. The completed ones were saved into a new folder called Done, which was inside the desktop folder I copied from dvd. I went to burn it today but the desktop folder has dissappeared?

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Spent two hours last night working on a series of scans. The completed ones were saved into a new folder called Done, which was inside the desktop folder I copied from dvd. I went to burn it today but the desktop folder has dissappeared?
Vista search will not find it and if I go back into Photoshop and "Open recent" - stuff from a week ago is there but nothing from last night. I believe they are gone for good. I'm hating Vista more and more

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If I search for the individual file names it comes up blank too. This was 1.4gb of data, how can that happen?
Any ideas?