Hello Curt,
Please accept our apologies for the delay in response and for the inconvenience this has caused you.
We're glad to hear that shutting your computer down and booting it up has resolved the issue.
Feel free to get back to us if you need further assistance from AVG.
We'd be happy to help you. Have a great day!
I'm replying to my own post.
After ca 9 hours with the same green bar travelling inside the box, looking like it was stuck, I shut down the computer and started it again. It worked out fine and also there was a message from AVG and said it had found one problem with a file that was put in quarantine, so it had most likely been running the boot-time scan properly but without the result on the screen.
Afterwards I rebooted the computer a couple of times and it is still working.
Hello Curt,
Please accept our apologies for the delay in response and for the inconvenience this has caused you.
We're glad to hear that shutting your computer down and booting it up has resolved the issue.
Feel free to get back to us if you need further assistance from AVG.
We'd be happy to help you. Have a great day!