Business often needs internet connections to run their businesses online. What Lea should do to resolve the problem is that since the host computer was manually configured using ICS which was one of the major cause of the internet sharing. The best thing to do is to disable the ICS and then there will be no internet sharing.
Internet Connection Sharing (ICS) is known as a Windows service that helps an individual in their Internet-connected computer so as to share its Internet connection with other computers on a Local area network (LAN).
The Host computer often shares its Internet connection and acts as a gateway means. All traffic between other computers and the Internet go through this computer due to this connection. It gives Dynamic Host Configuration Protocol (DHCP) and network address translation (NAT) services for the LAN computers.
Conclusively, ICS enable a host computer to share the internet connection with other computer within the area and as such it's internet connection make have issues when a lot of other connects to it.
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