Why is the network not working?

Question

Computer networks

Good day I have
windows 7 - the network has fallen off
4 packets are leaving and not a single one is accepted
In the livecd system everything works
I sinned on the network - after changing the 0 effect
I reset ip, winsock and advfirewall via netsh
Where else to dig? I really don't want to destroy the system.

Answer 1

Try changing the port on the switch.

Answer 2

Does the livecd system have the same IP and network settings?

Answer 3

where do the packages go? can you copy here?
and tracert on 8.8.8.8 for example do ?
as well as route -rn

Answer 4

route -f
netsh int ip reset
netsh int ipv4 reset
netsh int tcp reset
netsh winsock reset
ipconfig /flushdns

Answer 5

what do the logs say?

Answer 6

How did he get the address via dhtsp if there are no received packets. Write the static, show the route print output, try to ping the gateway.

Answer 7

Set network card properties to forced 10 Mbps