Please stop bombarding me with your screen images. These appear several times a day. Please understand that I will NEVER EVER buy any product from you since you cheated me last year. I would rather ber overrun with malware than do business with your crooked company. PLEASE LEAVE ME ALONE.
No-one forced you to install avast free (at least I hope not).
That avast is showing adds for their paid products is known for years.
If you do not want them, pay for avast and you can disable them or you can use something else.
Popups to make you aware of paid products only happen infrequently.
Wonder if you’ve made some changes to your settings that are causing your despair ???
Post a screenshot as already mentioned and maybe we can tell you how to fix it.