Incoming emails marked as spam

4 days ago all incoming emails started being marked as spam and go into the junk mail box.  What has happened?!!

Hello Ruth.
We are really sorry to know that your incoming email being moved to Spam folder. I would request you to try disabling the AVG program ( http://avgread.me/1GnMD3N ) and check if the issue persists.
If the issue persists, the issue will be associated with your Email client.
Please let us know here your results. Thank you.

Hello Ruth,

I am sorry for the inconvenience caused to you. Please let us know whether your AVG Internet security program scans the incoming emails and detects it has a threats? Please feel free to get back to us for any issues with AVG.

Thank you.

Hello Ruth,

I am sorry for the inconvenience caused to you. Please let us know whether your AVG Internet security program scans the incoming emails and detects it has a threats? Please feel free to get back to us for any issues with AVG.

Thank you.