Why can I not open files

why can I not open files created with libre office before i start the application. A message is displayed saying that elevation is required
I am using windows 7 Home Premium’ Just another point I have libre office installed on a XP computer which works perfectly. When I open a file libre office opens automatically and displays the file. My windows 7 computer also used to work the same way but after installing an recommended upgrade it stopped working in the same way. I now have to open libre office manually and then I can open the files.