I keep getting the message that I have 2 quot;broken digital signaturesquot; when I run my AVG security system each morning. It says I must do something to cure this; but I don't know what. What is this and should I worry about it? I recently had 2 credit cards stolen on-line and have updated my security system. It gives me an address for each and they both end in .exe. The Microsoft Corp one ends in .exe.exe (twice). I don't know what to do.