I Removed and inserted sim

Niranjan, If you're referring to an Android tablet, Please click on the following link (http://avgclick.me/AVGtechnical) and fill out your details, select as Android then the name of AVG Program that you installed in your tablet and in description please completely explain about your issue and finally click on Email option. The AVG team will reply back to you via email with a resolution.
AVG Guru

It asking password I forgotten what to do now I have only single Sim tablet

Niranjan, If you're referring to an Android tablet, Please click on the following link (http://avgclick.me/AVGtechnical) and fill out your details, select as Android then the name of AVG Program that you installed in your tablet and in description please completely explain about your issue and finally click on Email option. The AVG team will reply back to you via email with a resolution.
AVG Guru