Question : Wireless internet access lost after installing AVG free

A friend has just bought a new lenovo S10e with windows Xp preloaded and wireless ready.
I set up the the wireless LAN to join her peer-to-peer network and was able to access the internet immediately.
No antivirus came with the machine, so downloaded AVG free from the internet and installed it.
Then when attempting to update AVG, internet access was no longer available.

The machine still detects wireless networks and is still connected to her LAN. Why has internet access been lost? This happened to me once before and only "solved" the problem then by linking a cable between wireless router and PC.

I'm missing the fix for this which I suspect is simple(!)

Answer : Wireless internet access lost after installing AVG free

AVG Free is antivirus only; the firewall is only available in the paid version. So that's not the problem. And I understand the author to be saying that all Internet access has been lost, not just for AVG's updates.

A couple of choices: Do the normal steps for troubleshooting loss of Internet access, or uninstall AVG, potentially including a system restore to just before the AVG install, and see if that resolves the problem. (I assume you've already done a complete shutdown of the computer and restart, not just a reboot.)

Standard steps for troubleshooting:

1) Reset Winsock and IP stack:
At command prompt, give the following commands (on separate lines):
    netsh int ip reset resetlog.txt
    netsh winsock reset catalog
Check your access again.

2) ping www.yahoo.com
Do you get a response?
If not, ping 69.147.76.15
Do you get a response? If you get a response to the numbers but not the name, you have a DNS problem. If you get no response to the numbers, but other computers on the network are having no problems with Internet access, then your IP setup is pretty thoroughly messed up. Since it's a brand-new computer, probably the best solution in this case would be to reset to factory conditions (i.e., reinstall the system).

Perhaps others will chime in with additional steps to try, but that's what comes to my mind at the moment.