No, restoring your system is considered entirely safe and will not cause further problems with your Windows. Restoring your Windows platform doesn't require a safe mode beforehand in startup settings or any other precaution. Your Windows system properties will only be repaired after you run the system restore features and save all of your data that existed beforehand. The restore points are only meant to save data, and the rest is to fix problems and repair any corruption that is currently being caused in your Windows. You will also not need to alter your protection settings either; your system properties and previous state tools won't change unless there is a new major Windows update being made across the board that you weren't previously aware of before you decided to restore your Windows platform.