I am getting repeated messages to restart my computer cannot unferstand why?

John,
I understand the situation. Don’t worry I'll help you with your issue.
I suggest you repair your AVG and check if that fixes the issue.
Here is an article with the steps to repair your AVG: http://support.avg.com/SupportArticleView?urlname=How-to-repair-AVG

Since renewing my subscription I am getting messages to restart my computer, this has no effect.
I have carried out a full scan and nothing is amiss, what is wrong?
John,
I understand the situation. Don’t worry I'll help you with your issue.
I suggest you repair your AVG and check if that fixes the issue.
Here is an article with the steps to repair your AVG: http://support.avg.com/SupportArticleView?urlname=How-to-repair-AVG