Browser Updates

HELP!!!!! Please
having had a major system crash and repair I am now having problems with browsers. Every time that I try to make and make and Ebay / Amazone payment the system tells me that my browser(s) are out of date. I have now update Chrome 12 times and IE some 8 or 9 times and still I get the same issue. Of course security where transactions are involved is paramount but when you cant make a payment well I suppose that's 100% secure then.
I have been advised to change the AVG settings to allow or to dis-regard the browsers but I do not know what I need to change.
Can anybody please help with what is most likely a very simple fix.
Thank you all 
Joe