Hello Karel,
I apologize for the inconvenience. Please repair AVG Internet security http://support.avg.com/SupportArticleView?urlname=How-to-repair-AVG from the control panel and then check the status.
If you face any difficulties, please share the screenshot [http://support.avg.com/SupportArticleView?urlname=How-to-create-a-screenshot] of the Virus Update version to check and assist further.
I can't up to date virus definition with checking button for updates.
Hello Karel,
I apologize for the inconvenience. Please repair AVG Internet security http://support.avg.com/SupportArticleView?urlname=How-to-repair-AVG from the control panel and then check the status.
If you face any difficulties, please share the screenshot [http://support.avg.com/SupportArticleView?urlname=How-to-create-a-screenshot] of the Virus Update version to check and assist further.