tabs opening with download demands

Tech Support Guy System Info Utility version 1.0.0.2
OS Version: Microsoft Windows 7 Home Premium, Service Pack 1, 64 bit
Processor: Intel(R) Core(TM) i5-2450M CPU @ 2.50GHz, Intel64 Family 6 Model 42 Stepping 7
Processor Count: 4
RAM: 6050 Mb
Graphics Card: Intel(R) HD Graphics 3000, -1988 Mb
Hard Drives: C: Total - 715401 MB, Free - 535958 MB;
Motherboard: Dell Inc., 034W60
Antivirus: Ad-Aware Antivirus, Disabled

So, I cruise in Chrome. I have had problems with tabs opening up, usually a couple will open at a time, sometimes more, that ask to download something to update products that I don't even have on my computer. I simply close the windows and ignore them. but, they are a real nuisance.
I had been using the Microsoft antivirus products that you guys steered me to long ago. I am concerned that since I am on windows 7 they no longer keep them up.
I removed that Microsoft antivirus and installed the avg free and ran their diagnostic. One thing was discovered and removed, but since then the problem persists. So I ran Ad-Aware, that did not help. I downloaded and ran Kasperski antivirus. That is running but it did not show up in the TSG SysInfo log. Whats up with that?
I also ran spybot search and destroy. What was weird was that I could not use the immunize feature of that program. It said I did not have administrative privileges to do that. Can you help me on that point. I am the administrator!
So, I think I have AVG and Kasperski running together right now.
Can you help me sort through this mess?
Thanks
Michael