I have a dell desktop that I bought with windows 7 home edition a little over a year ago. The other night I was doing some yahoo searches and my McAfee Security thing popped up and said the site was bad and then another window opened and said that McAfee removed a trojan. Well, ever since that happened my computer has been basically useless. It won't allow me to connect to the internet, keeps saying limited access. It won't let me open my netgear network adapter program to see what's wrong with it. It also wouldn't let me open anything in the control panel
*ex. I can open the control panel but it won't let me free up disk space .I can open system restore but it won't let me run it. It won't let me troubleshoot anything as an administrator.
There's always a pop up saying that what ever action i'm trying to do isn't installed..?