@Sandy2121 

Hi, welcome to the community.

May I know who is your internet service provider?

Have you had this issue before installing Deco XE75? When Deco XE75 turned solid red if you connected a laptop via an Ethernet cable to the ISP modem, were you still able to get the internet connection?

How often would you usually have the disconnection issue?

It is suggested to check the IPV4 address under Deco APP>More>Internet Connection>IPV4 when Deco XE75 turned red.

If the IPV4 address remains unchanged, please refer to this link to change the WAN DNS to 8.8.8.8/8.8.4.4.

How to change DNS server settings on my Deco

Thank you very much and wait for your reply.

Best regards.