I had one of the standard "Your PC is being slowed by xx number of processes. Click here to see which ones are affected." [That may not be the exact wording but it is close]. When I clicked there were the usual suspects: registry items, update programs, clear cache etc. I just wanted to see which registry items were affected so I clicked on a legit Avast link, which then took me to a "review my account" page (mailing address, billing info. etc). Avast had increased the screen size to MAX and pressing Escape would not "release" it for me. I cried B.S. as I simply wanted to see what Avast was peddling but suddenly I was taken "hostage" by Avast's "ransomware". I am using Chrome on a Win10 machine, fully updated. The only way to get out of the Avast "place your order" page was to CTRL+ALT+DELETE and kill the Avast process. This is not even funny and it really leaves a bad aftertaste. Avast, you are better than this. At least give people a chance to "Cancel" their "order" that they never had ANY INTENTION of placing.
My Avast version: 20.2.2401 (build 20.2.5130.571)
Edit again: Just updated the Avast app, restarted the machine, was immediately taken to a full screen "Welcome to your new Avast..." (or something like that). I took the tour, decided NOT to try the 30 day trial of the Avast "suite" and was once again "held hostage" by Avast, in that there was no immediately intelligible and clear way to exit the app, OTHER THAN using CTRL+ALT+DEL and [temporarily] killing the app. Booooooo!
New Avast version: 20.3.2405 (build 20.3.5200.561)