To slide, no sound.
To reghakr, the RC has been installed for a while. I think there is a serous problem in the system, but I don't know why it happened, I almost have not done anything, it happened suddenly.
Now, I can't run almost all the programs, all the reasons are "Unspecified error", for example, I can't access computer management, device management, etc.
Thank you both, slide and reghakr.