What is the DHCP lease duration? To find it:
Open CMD window
type
ipconfig /all | find "Lease"
That will tell you when your DHCP renewal. For example on my PC
ipconfig /all | find "Lease"
Lease Obtained. . . . . . . . . . : Sunday, April 16, 2017 11:34:21 AM
Lease Expires . . . . . . . . . . : Sunday, April 23, 2017 8:12:28 AM