Hello, my Dell computer has got infected by Nova.rambler.ru which changes my homepage and search page settings without my approval. I have tried removing it with my antivirus program (AVG) and also try the manual removal guide in this article, but didn't work. I wonder if you have any other effective solution. Thanks!
Here is an article with links that may help you out. It includes a Microsoft Malicious Software Removal Tool that may be a solution to your problem.