WiFi connected but all softwares cannot

I have Dell Vostro 1014. I'm in Windows 7. Just last month, I'm experiencing short internet connections about 5 to 10 minutes everytime I turn on or restart it. Afterwards, it won't connect anymore. I went to SAFE MODE WITH NETWORKING, it wen't fine, the connection is fine, I browsed fine. But after two weeks, it stucked similarly to normal mode, where everything wont update, connect, or browse even internet icon shows connected. Help me, I'm using my friend's laptop for repairing purposes only. I used to follow forum's advice. restarting drivers using CMD, ipconfig flush dns and similar, etc. My chrome says DNS_PROBE_FINISHED_NXDOMAIN, my IExplorer won't connect, my firefox won't connect. All softwares won't connect.

This is my ipconfig/all results:

Microsoft Windows [Version 6.1.7601]
Copyright (c) 2009 Microsoft Corporation. All rights reserved.

C:\Windows\system32>ipconfig/all

Windows IP Configuration

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

Wireless LAN adapter Wireless Network Connection:

Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : Dell Wireless 1702 802.11b/g/n
Physical Address. . . . . . . . . : 90-00-4E-0F-C7-57
DHCP Enabled. . . . . . . . . . . : Yes
Autoconfiguration Enabled . . . . : Yes
Link-local IPv6 Address . . . . . : fe80::908b:ad16:b40b:e088%11(Preferred)
IPv4 Address. . . . . . . . . . . : 192.168.1.2(Preferred)
Subnet Mask . . . . . . . . . . . : 255.255.255.0
Lease Obtained. . . . . . . . . . : Tuesday, September 02, 2014 11:58:54 PM
Lease Expires . . . . . . . . . . : Thursday, September 04, 2014 12:34:37 AM
Default Gateway . . . . . . . . . : 192.168.1.1
DHCP Server . . . . . . . . . . . : 192.168.1.1
DNS Servers . . . . . . . . . . . : 192.168.1.1
NetBIOS over Tcpip. . . . . . . . : Enabled

Ethernet adapter Local Area Connection:

Media State . . . . . . . . . . . : Media disconnected
Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : Realtek PCIe GBE Family Controller
Physical Address. . . . . . . . . : F0-4D-A2-68-02-BA
DHCP Enabled. . . . . . . . . . . : No
Autoconfiguration Enabled . . . . : Yes

Tunnel adapter isatap.{3CA3D14E-E242-4E32-9359-6744D406F87E}:

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

Tunnel adapter isatap.{DD25F17A-65CA-476F-9218-0A75E06555D8}:

Media State . . . . . . . . . . . : Media disconnected
Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : Microsoft ISATAP Adapter #2
Physical Address. . . . . . . . . : 00-00-00-00-00-00-00-E0
DHCP Enabled. . . . . . . . . . . : No
Autoconfiguration Enabled . . . . : Yes

Tunnel adapter Local Area Connection* 12:

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

Tunnel adapter Reusable ISATAP Interface {306A9D9F-E7DF-4E0D-B346-013AF0882D41}:


Media State . . . . . . . . . . . : Media disconnected
Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : Microsoft ISATAP Adapter #4
Physical Address. . . . . . . . . : 00-00-00-00-00-00-00-E0
DHCP Enabled. . . . . . . . . . . : No
Autoconfiguration Enabled . . . . : Yes

C:\Windows\system32>