Help! Getting the dreaded unknown error 3036

[btitus]

Does anyone have ANY ideas about how to remedy this problem? I cannot download/update certain apps that I have already purchased. When prompted I check the "Check for Available Downloads" dropbox and that's when I get the error. I thought it was the computer I was using so I tried it on another computer in the house and still get the same error. Please can someone help, I am going absolutely nuts trying to figure this out!