Do as Nene says, If the problem is isolated to your PC next try:
- Is the windows DHCP service started?
In command prompt
sc query dhcp
You should see the state as running: (See below)
SERVICE_NAME: dhcp
TYPE : 30 WIN32
STATE : 4 RUNNING
(STOPPABLE, NOT_PAUSABLE, ACCEPTS_SHUTDOWN)
WIN32_EXIT_CODE : 0 (0x0)
SERVICE_EXIT_CODE : 0 (0x0)
CHECKPOINT : 0x0
WAIT_HINT : 0x0
- Try reset all your windows networking to default
1. Run CMD as admin
2. execute command: netsh winsock reset