I'm trying to fix an older, messy Windows XP installation. There were about 3 security suites installed (Symantec, AntiVir, and 3rd one) and OS updates were completely out of date.
So I began running Windows updates, the last one was SP3 and uninstalled all the security suites (the goal would be to install the free AntiVir Version after all other suites are completely removed). The host was always in a local network behind a firewall during this procedure.
Now, since the last reboot, I can't connect to the Internet anymore. All IP settings are ok, I can even ping google.com (so name resolution and networking must be ok). Any program the tries to connect to the Internet says it can't connect (IE for example). A telnet connection to google.com on port 80 also fails.
Does anyone have some ideas what I could do to make the network work again? Any hints what the problem could be?