Second why do I have four users when I am the only one on computer?
The accounts you see are groups and user names...So even if you are the only one with an account..you still have a Creator/owner group..and Administrator group...User name...and everyone..
Administrator group is all in a network with administrator privileges
Creator/Owner is the creator/owner of the document
Everyone is everyone on the network
User Name is account names (each will be listed)
Not sure how you got the duplicates but as Hoov said..reinstall should take care of it..There is also an option to remove a group in the properties>>security>>Highlight the group and click remove..I have never used this as there has been no need..
Glad you got it going...! Thanks for posting back and letting us know the solution that worked for you..