Recently installed AVG free anti virus

Since recently installing AVG free anti virus on my home computer I now find I cannot login into the computer. I get a notice saying that login isn't logged. Can someone advise me how I can over ride this in order to access my computer, please?

Hello Caroline,
We apologize for the inconvenience caused.
Could you please confirm whether you are unable to login to your pc as user? also try disabling AVG http://avgclick.me/TempDisableAVG and check whether you are able to login back.
Feel free to contact us for any further assistance. Thank you.

Hello Caroline,
We apologize for the inconvenience caused.
Could you please confirm whether you are unable to login to your pc as user? also try disabling AVG http://avgclick.me/TempDisableAVG and check whether you are able to login back.
Feel free to contact us for any further assistance. Thank you.