I went to use my laptop (ACER Aspire, 5740G) yesterday, the last use before that was Wednesday evening. When I logged on the first thing wrong I noticed was that my wallpaper had disappeared and after that I started seeing more and more problems, such as when I clicked the start button, the programs that would be listed there had all changed. My iTunes library was also completely cleared, and when I went to sort that out, all data in my files (Downloads etc.) had disappeared. After investigating this I found all the data was accessible through C:/Users. All new data (things I was downloading after the problem) were being stored in a TEMP folder. Please help me sort this out, I just want my laptop to be back to normal!