Local Area Connection doesn't have a valid IP configuration

I've been suffering from internet cut off for two days already! I've been using my router and this Window 7 for many years already. It happens two days ago. I was playing online FPS game while in the same time having a Skype call with a friend. Out of the blue, my internet got cut off and named as "Unidentified Network" and in the troubleshooting it tells "Local Area Connection doesn't have a valid IP configuration". I reset the router ,replug a new LAN cable and reboot the PC and it still doesn't work, showing the same thing again. I've no clue but let my brother find the solution and he expected it was his Hamachi conflicting our IP address. Therefore, he unistalled it and Tunggle and he said that it was went back on. The next morning, I boot up the PC and it's still fine, but I just give a quick check and went to class already. As I came back in the afternoon, it shows that annoying "!" yellow triangle again. My other PC, phone and iPad still able to connect. My brother is now clueless and suggested to format, but I really don't want to do that anymore and find the solution instead. I've been searching tons of solved forum and tried them out, still doesn't work. Around in the late afternoon it went back on for a short period and when I take the chance to use it, Boom, again that thing. Today this afternoon it happens to get back the internet itself again, but i quickly copy down the ipconfig /all before I expect it happens to get cut off, and it really does it after I copy down. Here's what I got.

When the internet is cut off:-

C:\Users\User>ipconfig /all

Windows IP Configuration

Host Name . . . . . . . . . . . . : User-PC
Primary Dns Suffix . . . . . . . :
Node Type . . . . . . . . . . . . : Hybrid
IP Routing Enabled. . . . . . . . : No
WINS Proxy Enabled. . . . . . . . : No

Ethernet adapter Local Area Connection:

Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : Atheros AR8151 PCI-E Gigabit Ethernet Con
troller (NDIS 6.20)
Physical Address. . . . . . . . . : 00-25-22-FC-0E-5F
DHCP Enabled. . . . . . . . . . . : Yes
Autoconfiguration Enabled . . . . : Yes
Link-local IPv6 Address . . . . . : fe80::2d67:ae64:9eab:5d8d%12(Preferred)
Autoconfiguration IPv4 Address. . : 169.254.93.141(Preferred)
Subnet Mask . . . . . . . . . . . : 255.255.0.0
Default Gateway . . . . . . . . . :
DHCPv6 IAID . . . . . . . . . . . : 201336098
DHCPv6 Client DUID. . . . . . . . : 00-01-00-01-1D-A9-36-DA-00-25-22-FC-0E-5F

DNS Servers . . . . . . . . . . . : fec0:0:0:ffff::1%1
fec0:0:0:ffff::2%1
fec0:0:0:ffff::3%1
NetBIOS over Tcpip. . . . . . . . : Enabled

Tunnel adapter Local Area Connection* 9:

Media State . . . . . . . . . . . : Media disconnected
Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : Microsoft Teredo Tunneling Adapter
Physical Address. . . . . . . . . : 00-00-00-00-00-00-00-E0
DHCP Enabled. . . . . . . . . . . : No
Autoconfiguration Enabled . . . . : Yes

Tunnel adapter isatap.{1CA35186-FF37-4349-9553-F37EBDBBF92B}:

Media State . . . . . . . . . . . : Media disconnected
Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : Microsoft ISATAP Adapter #3
Physical Address. . . . . . . . . : 00-00-00-00-00-00-00-E0
DHCP Enabled. . . . . . . . . . . : No
Autoconfiguration Enabled . . . . : Yes

---------------------------------------------------------------------------------------
When the internet is back on:-

C:\Users\User>ipconfig /all

Windows IP Configuration

Host Name . . . . . . . . . . . . : User-PC
Primary Dns Suffix . . . . . . . :
Node Type . . . . . . . . . . . . : Hybrid
IP Routing Enabled. . . . . . . . : No
WINS Proxy Enabled. . . . . . . . : No

Ethernet adapter Local Area Connection:

Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : Atheros AR8151 PCI-E Gigabit Ethernet Con
troller (NDIS 6.20)
Physical Address. . . . . . . . . : 00-25-22-FC-0E-5F
DHCP Enabled. . . . . . . . . . . : Yes
Autoconfiguration Enabled . . . . : Yes
Link-local IPv6 Address . . . . . : fe80::2d67:ae64:9eab:5d8d%12(Preferred)
IPv4 Address. . . . . . . . . . . : 192.168.1.9(Preferred)
Subnet Mask . . . . . . . . . . . : 255.255.255.0
Lease Obtained. . . . . . . . . . : Thursday, February 25, 2016 4:38:57 PM
Lease Expires . . . . . . . . . . : Sunday, February 28, 2016 4:38:57 PM
Default Gateway . . . . . . . . . : fe80::feb0:c4ff:fea0:8af8%12
192.168.1.1
DHCP Server . . . . . . . . . . . : 192.168.1.1
DHCPv6 IAID . . . . . . . . . . . : 201336098
DHCPv6 Client DUID. . . . . . . . : 00-01-00-01-1D-A9-36-DA-00-25-22-FC-0E-5F

DNS Servers . . . . . . . . . . . : 192.168.1.1
NetBIOS over Tcpip. . . . . . . . : Enabled

Tunnel adapter Local Area Connection* 9:

Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : Microsoft Teredo Tunneling Adapter
Physical Address. . . . . . . . . : 00-00-00-00-00-00-00-E0
DHCP Enabled. . . . . . . . . . . : No
Autoconfiguration Enabled . . . . : Yes
IPv6 Address. . . . . . . . . . . : 2001:0:ca47:63c2:34b8:141f:3f57:fef6(Pref
erred)
Link-local IPv6 Address . . . . . : fe80::34b8:141f:3f57:fef6%11(Preferred)
Default Gateway . . . . . . . . . : ::
NetBIOS over Tcpip. . . . . . . . : Disabled

Tunnel adapter isatap.{1CA35186-FF37-4349-9553-F37EBDBBF92B}:

Media State . . . . . . . . . . . : Media disconnected
Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : Microsoft ISATAP Adapter #3
Physical Address. . . . . . . . . : 00-00-00-00-00-00-00-E0
DHCP Enabled. . . . . . . . . . . : No
Autoconfiguration Enabled . . . . : Yes

C:\Users\User>

------------------------------------------------------------------------------------

Hope anyone can provide safety procedure to get over this problem of mine, thanks!