With any repair utility, you will need to remember two golden rules. Firstly; Do not try to repair something that is not broken, you might break it. Secondly; the utility cannot repair it all, we are not like the all-seeing and all-knowing Oracle, we cannot anticipate each and every situation, but this all said;

Complete Internet Repair should be able to help with most of your internet issues. Complete Internet Repair might help (no promises) if you are experiencing any of the following problems:

Internet or network problem after removing adware, spyware, virus, worm, Trojan horse, etc.
Loss network connection after installing/uninstalling VPN, firewall or other networking programs.
Unable to access any website or can only access some websites.
Pop-up error window with network related problem description.
No network connectivity due to registry errors.
DNS lookup problem.
Fail to renew the network adapter’s IP address or other DHCP errors.
Network connectivity issue with limited or no connections message.
Windows update does not work.
You are having problems connecting to secured websites (ex. Banking).
Internet Explorer stopped working or crashes all the time.
Sticky proxy server settings.
A few other internet errors, but we will not discuss all here.