Hello Jean,
We regret for the inconvenience. Could you please let us know whether you have tried to boot your PC in safe mode? If not please follow the instructions on the article http://avgclick.me/rebootintosafemode to reboot your PC in safe mode. If you are still facing any issues please provide us with the screenshot so that we could analyze the issue more better. Please follow the instructions on the article http://avgclick.me/getscreenshot to create the screenshot.
Please feel free to get back to us for further assistance.
Thank you.
How can I remove Watchdog which prevents windows from opening?
Jean, 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