Wireless connection but no internet access Windows 7 Ultimate

Hi,

I seem to have a problem with my Medion Akoya Netbook, which operates Windows 7 ultimate. Until yesterday I had no problem accessing the internet. But after I updated and ran Avast! (free virus protection) and ran Reg Cure Pro (Clean Up-progam), I could not access the internet anymore. It says I am connected, but that there is no internet access. We share the router with 5 people, but the others don't seem to have any problem. So I think i'ts nothing to do with the router. (a solution I keep finding on the windows-anwser-pages)

I have been surfing an searching all day allready and troubleshooting my own ideas, but nothing seems to work. It seems a lot of people are getting this problem, but it also seems there is a variaty of ways to fix it. None of them work for me.

So that is why I'm asking for specific help here. I copy-pasted the info about my connections through command promp (I found out to do so on this forum). So I was wondering if someone is able to help and advise me. Thx!

Microsoft Windows [Version 6.1.7600]
Copyright (c) 2009 Microsoft Corporation. All rights reserved.

C:\Users\Stift>IPCONFIG/ALL

Windows IP Configuration

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

Wireless LAN adapter Wireless Network Connection:

Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : Intel(R) Centrino(R) Wireless-N 130
Physical Address. . . . . . . . . : B8-03-05-99-12-5E
DHCP Enabled. . . . . . . . . . . : Yes
Autoconfiguration Enabled . . . . : Yes
Link-local IPv6 Address . . . . . : fe80::741a:6d89:ca79:f51d%15(Preferred)
Autoconfiguration IPv4 Address. . : 169.254.245.29(Preferred)
Subnet Mask . . . . . . . . . . . : 255.255.0.0
Default Gateway . . . . . . . . . :
DNS Servers . . . . . . . . . . . : 208.67.220.220
NetBIOS over Tcpip. . . . . . . . : Disabled

Ethernet adapter Local Area Connection:

Media State . . . . . . . . . . . : Media disconnected
Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : Realtek PCIe FE Family Controller
Physical Address. . . . . . . . . : 4C-72-B9-44-76-4E
DHCP Enabled. . . . . . . . . . . : Yes
Autoconfiguration Enabled . . . . : Yes

Tunnel adapter Teredo Tunneling Pseudo-Interface:

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

Thx for replying so fast! Hope to fix it as fast too

@The Cyberman: That was one of the first things I did. First I restored to the Reg Cure-restore point without effect. Secondly I restored with the Automatic Restore Point generator. I also uninstalled Avast!-antivirus, I figured it might be the version-upgrade that ****ed things up. But also without effect.

@benjy206: Indeed my laptop seems to have problems identifying/getting acces to the router. But I truely don't know how to fix this. I made the screenshot yopu asked for and also some other screenshots that might be relevant, I don't realy know. Because the problem aslo seems to be happening when I try to connect with a LANcable, I also made a screenshot of this.
Then I made a screenshot af the modem it detects when looking in the "network"-section in windows explorer. The modem we have is a cbn model CH6541E used by the belgian webprovider Telenet. To me it looks to be the wrong one it recognizes (maybe the one of the neigbours...). I also don't find the 8-digit Pincode on the modem it asks to give in.
An other thing that might be relevant here is that in the "Advanced Sharin Settings", I don't seem to be able to turn on the "network discovery".
Lastly I did some troubleshooting and have a screenshot from the result of the "Homegroup Troubelshooting" as a paste of the "Network Troubleshooting" here:

Diagnostics Information (Network Adapter)
Details about network adapter diagnosis:

Network adapter Wireless Network Connection driver information:

Description . . . . . . . . . . : Intel(R) Centrino(R) Wireless-N 130
Manufacturer . . . . . . . . . : Intel Corporation
Provider . . . . . . . . . . . : Intel
Version . . . . . . . . . . . : 15.0.1.1
Inf File Name . . . . . . . . . : C:\Windows\INF\oem7.inf
Inf File Date . . . . . . . . . : Monday, February 13, 2012 3:02:48 PM
Section Name . . . . . . . . . : Install_MPCIEX_GEN_0130_BGN_1x1_HMC_WIN7_BGN
Hardware ID . . . . . . . . . . : pci\ven_8086&dev_0896&subsys_50058086
Instance Status Flags . . . . . : 0x180200a
Device Manager Status Code . . : 0
IfType . . . . . . . . . . . . : 71
Physical Media Type . . . . . . : 9


Diagnostics Information (Wireless Connectivity)
Details about wireless connectivity diagnosis:

Information for connection being diagnosed
Interface GUID: a3cd8e02-27fb-4973-9206-468c11deb674
Interface name: Intel(R) Centrino(R) Wireless-N 130
Interface type: Native WiFi

Connection incident diagnosed
Auto Configuration ID: 1
Connection ID: 1

Connection status summary
Connection started at: 2013-03-24 13:47:27-434
Profile match: Success
Pre-Association: Success
Association: Success
Security and Authentication: Success

List of visible access point(s): 8 item(s) total, 8 item(s) displayed
BSSID BSS Type PHY Signal(dB) Chnl/freq SSID
-------------------------------------------------------------------------
5E-35-3B-1D-FC-D9 Infra <unknown> -62 10 TELENETHOMESPOT
5C-35-3B-1D-FC-D8 Infra <unknown> -60 10 telenet-3C02C
00-1C-DF-7F-6E-7D Infra <unknown> -51 6 Belkin_N_Wireless_7F6E7D
00-24-01-D3-69-5A Infra g -85 6 Wifi 27
5C-35-3B-0C-CF-B6 Infra <unknown> -71 1 telenet-9D4EB
5E-35-3B-0C-CF-B7 Infra <unknown> -72 1 TELENETHOMESPOT
84-C9-B2-D5-01-BA Infra <unknown> -86 1 elza
00-21-29-74-7B-5E Infra g -89 12 vanbeneden

Connection History

Information for Auto Configuration ID 1

List of visible networks: 7 item(s) total, 7 item(s) displayed
BSS Type PHY Security Signal(RSSI) Compatible SSID
------------------------------------------------------------------------------
Infra <unknown> No 81 Yes TELENETHOMESPOT
Infra <unknown> Yes 99 Yes telenet-3C02C
Infra <unknown> Yes 81 Yes Belkin_N_Wireless_7F6E7D
Infra g Yes 33 Yes Wifi 27
Infra <unknown> Yes 45 Yes telenet-9D4EB
Infra <unknown> Yes 18 Yes elza
Infra g Yes 18 Yes vanbeneden

List of preferred networks: 1 item(s)
Profile: telenet-3C02C
SSID: telenet-3C02C
SSID length: 13
Connection mode: Infra
Security: Yes
Set by group policy: No
Connect even if network is not broadcasting: No
Connectable: Yes

Information for Connection ID 1
Connection started at: 2013-03-24 13:47:27-434
Auto Configuration ID: 1
Profile: telenet-3C02C
SSID: telenet-3C02C
SSID length: 13
Connection mode: Infra
Security: Yes
Pre-Association and Association
Connectivity settings provided by hardware manufacturer (IHV): No
Security settings provided by hardware manufacturer (IHV): No
Profile matches network requirements: Success
Pre-association status: Success
Association status: Success
Last AP: 5c-35-3b-1d-fc-d8
Security and Authentication
Configured security type: WPA2-PSK
Configured encryption type: CCMP(AES)
802.1X protocol: No
Key exchange initiated: Yes
Unicast key received: Yes
Multicast key received: Yes
Number of security packets received: 0
Number of security packets sent: 0
Security attempt status: Success
Connectivity
Packet statistics
Ndis Rx: 668
Ndis Tx: 92
Unicast decrypt success: 0
Multicast decrypt success: 0
Unicast decrypt failure: 0
Multicast decrypt failure: 0
Rx success: 517
Rx failure: 0
Tx success: 1
Tx failure: 0
Tx retry: 0
Tx multiple retry: 0
Tx max lifetime exceeded: 0
Tx ACK failure: 0
Roaming history: 0 item(s)



Diagnostics Information (Wireless Connectivity)
Details about wireless connectivity diagnosis:

For complete information about this session see the wireless connectivity information event.

Helper Class: Auto Configuration
Initialize status: Success

Information for connection being diagnosed
Interface GUID: a3cd8e02-27fb-4973-9206-468c11deb674
Interface name: Intel(R) Centrino(R) Wireless-N 130
Interface type: Native WiFi

Result of diagnosis: There may be problem





Diagnostics Information (Wireless Network Adapter)
Details about wireless network adapter diagnosis:

For complete information about this session see the wireless connectivity information event.

Helper Class: Native WiFi MSM
Initialize status: Success

Information for connection being diagnosed
Interface GUID: a3cd8e02-27fb-4973-9206-468c11deb674
Interface name: Intel(R) Centrino(R) Wireless-N 130
Interface type: Native WiFi
Profile: telenet-3C02C
SSID: telenet-3C02C
SSID length: 13
Connection mode: Infra
Security: Yes
Connect even if network is not broadcasting: No

Result of diagnosis: There may be problem

Yes, this laptop is the onlyone experiencing the problem. The one I'm using right now for example is on the same modem.
And these screenshots were allready from a cable directly to the modem...