Unless you can remember your password, remove it later in User Accounts.
When you get back in, suggest you uninstall McAfee paid AV and install Avast free home
which is a much lighter weight and less intrusive solution.
Go through Programs and Features and root out other bloatware you don't want. Run msconfig to uncheck all of the Startup Programs except AV and MS entries - the others are freeloaders on your RAM/CPU.