@sandy55.
Do not panic, You need to solve problems one at a time.
I assume as you are able to post here on the forum, your forum password now works ok. True?
As you have paid Avast AV and also paid Avast VPN you should be entitled to avast support as well as help from other users like me.
Is the Avast icon present in the system tray at the bottom right of your screen?
If true, right click on that, then click on "about Avast" to check which version you currently have installed.
Are you able to open the Avast user interface and run a scan?
Are you able to login to your Windows admin account?
If Avast is issuing pop-ups warning of malware then you need to tell us what these warning say. This is best done by adding a screenshot, but do not include any personal information.