Network not building?

Question

Computer networks

There is a network from 200 PCs approximately. OS different is also XP and 7 and 10. All work from the working groups. Everyone has a shared OPEN folder. IP addresses are registered manually. On most cars. What could be? Today it is, but tomorrow it shows nothing at all either in the network environment or in NetView. Only Advanced IP Scanner shows...

Answer 1

Google "Master Browser in Workgroup".
In them, elections of this role often occur and, accordingly, computers on the network fall off.