@SamanthaLJones10 Add a user account like this:
Refuse to add an email address, and you'll eventually be allowed to proceed without one. Once you've created the account, give it admin rights.
@tamyrasaulsby There are a few more suggestions here:
https://answers.ea.com/t5/Technical-Issues-PC/CURRENT-ISSUE-Sims-4-already-running/m-p/13276380
I would test the suggestions while your antivirus is disabled just to be thorough, especially the suggestions that include creating a new folder. Sometimes the AV can lock up a folder before you have a chance to test the game even once.
