Ive been offered an upgrade to Halo 1. Will this sort out disconnecting of the internet and also would I have to pay an engineer to install it. If not, is it easy to install.
Halo 1 will not sort out any connection problems with your Internet.
If you are not changing from "normal" broadband to fibre broadband there is no installation, it is an administrative change.
See link about the Halo products. Make sure you read the Important Information part for Broadband at the foot of the page.