I think I have a virus or some sort of malware on my desktop. I wasn't running any antivirus because I'm lazy and never reinstalled it when I reinstalled XP on my desktop a few weeks ago and now whenever I'm turn it on, it gives me a logon screen (I only have 1 account on this computer and it isn't passworded) and I'm getting all kinds of error messages when XP starts. Also, when I open Firefox or IE it will only load certain websites, other ones (such as microsoft.com or anywhere that I could download some sort of antivirus to fix the problem) will not load. I'm not computer retarded but I've never had something that only restricts certain websites. I tried installing AVG antivirus but it won't run the setup because it says I don't have an active internet connection (which I obviously do since I'm on OR). Any advice/ideas would be appreciated.