My home page is blocked by site www.404dnserror.com telling me to install anti spyware How do I get rid of it?

I’m sure their just cons trying to get me to buy their anti spyware, but their buggering up my pc!!! I’ve tried Nortons anti virus and other well known anti spyware, but nothing touches it. Another address that pops up is www.securitynetpage.com

It sounds like you may have a worm or trojan horse. This happened to my computer awhile back and Norton never caught it. I believe I got it through AOL instant messanger. There are directions online for how to get rid of such things, but this happened to me like two years ago…Good Luck!

Security Suite (Best Anti-Virus Programs)

Alienware M17x 17-Inch Gaming Laptop (Space Black), Intel Core i7-740QM 1.73GHz, 8GB DR3 Memory, 500GB Hard Drive, 1GB ATI Mobility Radeon HD 5870 Graphics, Windows 7 Home Premium $2,799.84 Take control of your gaming with the Alienware M17X multimedia laptop (model m17x10-1847DSB), which features a thermally optimized case design with aggressive lines and an in-your-face attitude. It features a stunning, high-definition 17-inch display and a powerful Intel Core i7 processor–featuring four cores of intelligent processing power. Additionally, it offers ultra-fast DDR3 system memory a…

Alienware M17x 17-Inch Gaming Laptop (Space Black), Intel Core i7-740QM 1.73GHz, 8GB DR3 Memory, 640GB Hard Drive, 1GB ATI Mobility Radeon HD 5870 Graphics, Windows 7 Home Premium $2,599.84 Take control of your gaming with the Alienware M17X multimedia laptop (model m17x10-1847DSB), which features a thermally optimized case design with aggressive lines and an in-your-face attitude. It features a stunning, high-definition 17-inch display and a powerful Intel Core i7 processor–featuring four cores of intelligent processing power. Additionally, it offers ultra-fast DDR3 system memory a…