In you initial post your said "I have 3 computers connected. All are windows 10. "
Are you saying you don't think the problem is with Windows 10? Do you have Home or Pro versions and are all three computers the same?
Are they all in the same Workgroup?
What do you have showing for Network, here is mine below, my two Laptops are not in use at this time. Click on, tap or activate image to enlarge it.
You may have already done this, if not, open Settings>Network and Internet>Status>Change Connection Properties. See image below.