I'm pretty sure my computer has downloaded a virus, and I'm completely stuck as to what to do.
Ok, to start from the beginning, I have McAfee SecurityCenter, which, while it does protect my computer from some viruses and spyware, doesn't recognize a lot of viruses. I really don't want to download anything to my computer, so I use System Restore.
Today, I got a popup from McAfee stating that it has removed a Trojan. Shortly after that, I get several popups in a row announcing a registry change, which I blocked. Then, whenever I opened Internet Explorer, I would get different popup advertisements. Now, I've had a similar virus before (Internet Speed Monitor) that I had gotten rid of, so I thought that it had somehow downloaded itself onto my computer again. However, it isn't Internet Speed Monitor, and I have no clue what it's called.
I tried to do a System Restore (once again, I try to avoid downloading things to my computer), but for some reason, on the calendar to select a restore point, it wouldn't let me click on any restore points. The only point it would allow me to click on was one set for earlier today. I did a full System Restore but the virus was still on my computer. I tried to set my own restore point for a few days ago, but, though System Restore claimed to have restored my computer, the virus still wasn't removed. In addition, Windows Security Alerts are now disabled. I click on the button that says, 'Turn Automatic Updates On' but I get a popup that says, 'We're sorry. The Security Center could not change your Automatic Updates.' I tried to do it manually, and though the 'Automatic Updates' is checked, they're still turned off.
My dad told me to do a McAfee Security Scan (even though I protested that it wouldn't detect anything), so I began one. After about twenty minutes of scanning, my computer rebooted itself, saying that it has recovered from an error. I'm no longer getting advertisement popups when I'm on Internet Explorer, but I still can't click any restore points in System Restore and Automatic Updates are still turned off.
I really don't want to download anything (I can't be sure anything on the Internet is legitimate anymore), but I've got no idea what to do and my anxiety is through the roof. Can someone help me, or am I completely screwed?
Sorry I've written so much, but I'm trying to give as much information as possible. Thanks for your patience.
Configuration: Windows XP
Internet Explorer 7.0