Download, install, update and run this first...
superantispyware
http://www.superantispyware.com
Remove all it finds-
Certain infections (NewDotNet and Webhancer are two of the culprits) insert their own segments into the Winsock chain-
When the software gets removed the chain gets broken (a link is missing) and is no longer continuous.
Running LSP-fix tool will re-arrange the Winsock links in proper order and put them back into numerical order. Essentially, repairing the chain.
Simple instructions for using the tool and the tool download link are located at the site below:
http://www.bleepingcomputer.com/tutorials/tutorial59.html
Note:
Download the tools onto a 'flash drive' from a friend's computer and transfer to yours..then install.
Hope this helps.
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Use protection,
your computer will thank you.