This is just stupid! I had uninstalled Avast from my computer and cell phone due to the issue with virus definitions updates (I didn't use Avast for one week), and I read that the issue with the lack of virus definitions updates was solved. I uninstalled the other antivirus that I was using, and reinstalled Avast on my computer and cell phone.
Today, October 24th 2019, I just found out that Avast is up to date on my cell phone (It was updated on October 24th 2019), but my computer is not receiving virus definitions updates again. Avast stopped receiving updates yesterday, October 23rd 2019, and today it didn't receive any updates. Is this the second round of Avast for Windows not working as it should?...Depressing!