Windows 7: Shellcode Injection

About an hour ago I did an error check on my C drive. I had to restart my computer to do it and after it was done and I had logged back in Comodo Defense had blocked the application explorer.exe. I wasn't browsing the internet in FireFox yet. It said "this is typical of a buffer overflow attack". It said it isolated explorer.exe from the rest of the system and will continue to do so unless I skip the alert but it is strongly recommended that I close the application and contact with it's vendor for a fix. So, I hit terminate and here I am.

Now what? Nothing happened when I hit terminate. Under defense events it says the application is C:\windows\SysWOW64\explorer.exe and the flag is Shellcode Injection. Like I said, it didn't alert me until an hour ago but under defense events it's listed as also happening at 11:43 last night. I believe windows ran something last night, can't remember what. I think it was a Windows virus scan or something, it wasn't Comodo that ran it.

I am currently running Comodo virus scan to see if anything is in there, but so far nothing. What's a vendor and how do I contact them to fix explorer.exe? Is this something to be concerned about? I'm decent with computers but I don't know a lot, so please keep that in mind.

Try reseting IE to its defaults first. Tools > Internet Options > Advanced > Reset button. Are you running IE8 or IE9?

I'm not sure which version I'm on, but I use FireFox to browse the internet, I never use IE.

Edit: I just ran Comodo, which found nothing, and Malwarebtyes, which found 34 spyware.onlinegames which have now been quarantined. Did it not do anything to my computer?

Please post the Malwarebytes' log. You can find the log in the Logs tab. The bottom most log is the latest.