MS OFFICE 2013 all files are in read only format

MS OFFICE 2013 all files are in read only format

In default Admin account i am able to edit these files and save them in same document.
when i tried in a new test account with full control also still i am facing the issue as read only.

i tired in registry given full control to everyone this one also not solved the issue.

When i made changes it is asking me to create a new file but not saving in same file name.

please help me to fix the issue


thanks in advance