Lock icon on many files in my home folder

Many of the files in my home folder have a small lock icon in the lower left corner. I think this may have to do with the fact I installed several times trying to get a dual-boot set up. Anyways, I have attempted to remove the Windows.old, Windows.old.000, and Windows.old.001 folders, which I finally managed to do. However, the lock icons still remain on many files in my home folder. I don't think this affects it functionally, but it is rather annoying to have a lock icon on every file on my desktop, and on most files under my home folder.

Does anyone know how to remove these icons? My guess is that it's a permissions error or something.

The lock icon has to doing with file sharing. It indicates that only the owner the document has write access to the file.

Have you set up a HomeGroup for your Windows 7 system? You may want to change your HomeGroup settings to either turn off sharing or allow Read/Write access to all users.