There are lots of viruses in my computer

Hello Kondo.
You've reached the AVG community support forum.
We deeply regret any inconvenience caused to you. 
We'll certainly look into this and help you to fix the virus issues. Before we proceed, would you be so kind as to share us a few screenshots (https://support.avg.com/SupportArticleView?l=en&urlName=avg-create-screenshot&q=screenshot&supportType=home)of the virus pop-ups you're referring to?
Does the virus pop-up appear when you're trying to access a particular website using a certain browser or irrespective of them?

Also, please ensure that the AVG program has the latest patches applied to it.
Open AVG program - click on refresh icon beside virus definitions, at bottom left corner - Restart computer after successful update & check.

Awaiting your response.

Dear all staffs
Hi,I entered subscription of your company,but there is a lots of warning message that your computer was infected virus,so you had better delete it as soon as possible.I want to know what's wrong with my computer.how can I fix this problem.I would like to know the method to delete viruses.I really appreciate it if you told me this question.

Sincerely yours.

Takahiro Kondo

Hello Kondo.
You've reached the AVG community support forum.
We deeply regret any inconvenience caused to you. 
We'll certainly look into this and help you to fix the virus issues. Before we proceed, would you be so kind as to share us a few screenshots (https://support.avg.com/SupportArticleView?l=en&urlName=avg-create-screenshot&q=screenshot&supportType=home)of the virus pop-ups you're referring to?
Does the virus pop-up appear when you're trying to access a particular website using a certain browser or irrespective of them?

Also, please ensure that the AVG program has the latest patches applied to it.
Open AVG program - click on refresh icon beside virus definitions, at bottom left corner - Restart computer after successful update & check.

Awaiting your response.