My red rice mobile phone security center has stopped running, how can I recover?

You can restart the phone first, or suggest restoring the factory settings. Or a double-clear mobile phone.

If not, you can install a security software and set it up.

The Tencent mobile phone housekeeper I am using now is good.

Tencent Mobile Manager is a completely free mobile phone security and management software. Although small, it has comprehensive functions.

Tencent Mobile Manager adheres to the concept of "security is self-centered and simple", and actively meets the high-end and intelligent mobile phone management needs such as user privacy protection, online management and system optimization on the basis of providing intelligent virus killing and harassment filtering in the cloud, so as to better protect your mobile phone.