[Solved] All files locked after update to 4.1.1

Hi,
I installed the 4.1.1 update offered through the programme yesterday only to find that all my files were "Locked for editing by Unknown User". No hidden lock files to delete. Could not open copy and then just save over the old one since it would not let me save to desktop. I have ownership and full permissions etc for the desktop and all other desktop items had no problem so it was only OO files.
Uninstalled and reinstalled 4.0.1 today and all back to normal.
Any ideas? Or am I just stuck with 4.0.1 and I can never upgrade again?
OS: Windows 8.1
Thanks in advance.
I installed the 4.1.1 update offered through the programme yesterday only to find that all my files were "Locked for editing by Unknown User". No hidden lock files to delete. Could not open copy and then just save over the old one since it would not let me save to desktop. I have ownership and full permissions etc for the desktop and all other desktop items had no problem so it was only OO files.
Uninstalled and reinstalled 4.0.1 today and all back to normal.
Any ideas? Or am I just stuck with 4.0.1 and I can never upgrade again?
OS: Windows 8.1
Thanks in advance.