Googlom sa daju najst kadejake historky o zmiznuti suborov z plochy, napr. jedna sice je to asi u Visty ale zaujimave
http://www.computing.net/answers/windows-vista/mis sing-desktop-files-folders/2620.html
Fixed the problem without doing a system restore.
What I did was go into regedit Local Machine>Software>Microsoft>Windows NT>Current Version>Profile List
There were 2 identical profiles there but one had a .BAK extension. I renamed the non BAK one and removed the BAK from the profile with it. After I clicked on the profile. In the right window there was a entry call State. I just changed it to 0. All was fine after a restart.
Skontroluj.
Prip. ak mas domenu a nejaky cestovny profil tak skontroluj ci sa nahodou PC neodpojil z domeny alebo co a teraz pouziva novy lokalny profil, apod. Sice vo vsetkych uvedenych pripadoch by si ale mal mat tie subory aj lokalne v zlozke nejakeho profilu (prezri si rucne vsetky zlozky profilov v zlozke Dokumenty a nastavenia. Plocha je zlozka plocha.)