Hey samymukadi,
Thank you for reaching out! That can certainly be frustrating 
. There may be several reasons why that is happening. It may power or signal related. To ensure you receive the best experience, please ensure the modem is plugged into a wall outlet directly and not through a power bar. Then, try the troubleshooting steps here to ensure the coax cable has a solid connection. If the modem continues to restart multiple times after that, your best bet is to touch base with technical support to further investigate or schedule a technician visit. Let me know if you have any other questions.
Cheers,
Tony | Community Mod.