I think I have fixed the problem. The problem was that I chose an option in my Window Washer program under WASH SETUP/WINDOWS SYSTEM called "DEFAULT LOGON USER NAMES" which does the following,
"Default Logon User Names This Windows registry entry stores the last user name used to log on to your computer. Ticking this option deletes this registry entry, which means that you will have to enter your user name each time you turn on or restart your computer"
So I unticked the "DEFAULT LOGON USER NAMES" option, and now the problem seems to have gone away, I will run my PC for a few days and see if the problem comes back, before I tick resolved. I thought I would post back my solution back, just in case some other Window Washer users are having the same problem.