2. Broken Internet Connection
If your system has had an adware or spyware infection removed, or you have deinstalled certain anti-virus products, you may find that the machine will no longer successfully connect to the internet. This may be because The Windows ‘Winsock’ communications software has been damaged. In some cases, the network connection may look as if it is partly working, for example it gets assigned an IP address from the DHCP service, but application software such as a web browser cannot retrieve web pages.
Various free utilties can be used to quickly repair corrupt Winsock problems, for example
LSP-Fix available from http://www.cexx.org/lspfix.htm. (This particular utility easily fits on to a 1.44Mbyte floppy disk.)