About 15 times a day two new browser window suddenly open...They are spam telling me I won or trying to get me to download something. Here is the URL of one that opened.
There must be some spy ware in my system. Why doesn't my McAfee remove it during the scans?
This link may assist you in removal of the virus you have on your computer
Required Reading - Home User Assistance Malware Troubleshooting (http://community.mcafee.com/docs/DOC-1294)
You might also try to run Malwarebytes http://www.malwarebytes.org
and SuperAntispyware http://www.superantispyware.com
both programs are free and catches a lot of stuff. I suggest you download these to a usb stick on a non infected PC and rename the download and installation files to something you can easily remember as virus and malware are written to self protect itself so by virtue of renaming them the virus will not see them as a threat. After installation check for the latest updates and run the program and let it clean everything it finds and reboot the computer. Next step is to do the same for the other program.
Try booting into safe mode and perform these procedures. I see you have already tried MBAM and Spybot but maybe safe mode will get you cleaned up.
Let us know how this works for you.