Wolgie,

This I agree with WaCKy-Angel 's 2nd post of troubleshooting; if outside you can see your CCTV its a PC issue.
So please ignore whatever other saying "Need to subscribe Hotspot " , "Modded modem kena blocked"

I have a modded 4G modem and have no issues so far.

Have you tried using your phone or any other wireless device, connect to the modem wirelessly, see if its OK or not?
Are you able to browse the internet wirelessly as normal?

This is not a matter of DIGI blocking, cause if it really want to block sharing, both your LAN and Wireless will be blocked.

What I can suggest for your PC, try this method, since I kena before.

Goto Command Prompt , and make sure you "Run As Administrator".
Then run this command - One command at a time.

netsh winsock reset
ipconfig /flushdns

Then restart, see if that works.

Hi bro, PM-ed you.