Misty2262

I have spent three days trying to download different spyware items with no luck. I can go to regular web pages, but I am infected with a winlogon trojan and any time I try to open up a site to download anything, including malwarebytes, I get the unable to connect page and up top in the address line it says this: http://browser-security.microsoft.com/block.php?r=17.2. Any help would be appreciated. I'm about to just throw this computer away and go buy a new one.