Hello, please make sure all connections are tightly fastened and free of damage. Do you have a splitter, by chance? Splitters can degrade in signal over time or fail without warning. Freezing and lag is typically an indication of a signal issue. Does this happen more so with live TV, On Demand or both? The best course of action may be to send out a service technician to diagnose further. For additional support, please reach us on Twitter at @CoxHelp, visit us on Facebook, or at cox.help@cox.com. -Kevin M. Cox Support Forum Moderator