Please

Please, can anyone help me so I can search the web again. I have tried Internet Explorer, and Firefox, and I have tried many search engines and it goes to whatever site that the antivirus xp 2008 wants to. I also can’t go to websites, such as homedepot.com as an example. I can’t download anything either. Please help! I got rid of the main virus, as far as I can tell, and I just need some help with this. I have backed up my files and I’m willing to strip my computer if I have to, but I also don’t know how to do that really lol Please, if someone can help, I’d really appreciate it! Thank you!