Hello Marius,
We regret for the inconvenience caused. Please run AVG repair avgclick.me/RepairAVG from your computer control panel and check if that fix the issue. If you get any error message, please send us the screenshot http://avgclick.me/getscreenshot of the same. We will check the error message and assist you further.
Since the Microsoft W10 upgrade yesterday my Internet security wont open on the desktop and VPN won't connect. Is this a general problem.
Marius, If applicable… For your info, just in case that you are unaware, you can post the screenshot here in your topic. Click on 'Answer' & then click on the 'Image' [mountain symbol] & follow the instructions.
AVG Guru