Laura,
Whenever you get this, I'd like to suggest STOPzilla for your Virus situation. You can go to
STOPzilla – Security Software by STOPzilla, to DL and install the Trial. I guarantee it will find something - it's just a matter of how bad it might be after your efforts already. I'm a Computer Tech, and SZ is the absolute best I've found. It finds things that most others miss, especially the Free programs like AVG, SpyBot, etc., but Norton and McAfee too. It's full AntiMalware - AntiVirus, AntiSpyware, AntiBadStuff, but it's very user friendly, without a bunch of Paranoid Warnings, and has a very small footprint, so it's great on older systems, too (just in case). IDK how well it would run with other AntiMalware programs installed, so you might have to uninstall anything else. I think the Trial might run OK, but you'd definitely have to uninstall them if you wanted to keep SZ. It's really that good, and you wouldn't NEED anything else. I put it on all my customer's PCs, and have it on all of mine.
The new version is called STOPzilla AVM 2013.
If it finds bad stuff, you'll have to purchase it to get it off (unless you're a Guru), but the Trial will find and report everything. You can buy it Annually for about $40/year, or a Lifetime License, for the life of the version (5 years expected) is about $100. If it doesn't find anything, then uninstall it. But I have to say that it's well worth the money. Norton and McAfee go for around $50/year, so $100 for 5 years is a really good deal, especially for how Good it is. Version 5 lasted from 2006 (if not 2005) until just recent. The only real downside is that a License is only good for one (1) computer.
If you wanted to try it, you could create a System Restore Point, Disable your other AntiMalware from Automatically Running, and install SZ. If you had to, then uninstall the old AntiMalware Programs, create another System Restore Point, install AVM 2013, and run it. If you don't need to keep it, then going back to what you had would be easier with the Restore Points.
If you need help with it, you can PM me. I could give you my Phone Number, and even walk you through it over the phone (No Charge!!!).