Sims 4 stutters for a few seconds about every 1-2 seconds ONLY in offline mode.

@bleakheart26  Did you restart your computer in between, or do anything else?  Have you tried disabling the Origin Client and Web Helper Services?  You can kill them in the Task Manager, but they'll come back sooner or later; the more permanent intervention is to disable them using msconfig.  And of course to check the TM again afterwards.