My avast antivirus is not updating
Follow them all, and you've probably eliminated at least 95% of all potential problem sources.
I have a connection, but everytime I hit update, the error messages say no connection found. Also, there are certain sites that I am completely blocked from, including any site that involves an antivirus. You may or may not be able to dig yourself out of this particular hole if you kept at it long enough, but the quick and easy solution here is just to format and start over.
For instance, I'm assuming everything needs to be cleared out, but how? Well, formatting gets rid of everything, so you don't need to worry about that.
If there's anything you want to save, you'd best be putting it onto CDs, DVDs, flash drives, or whatever else you can.
Also, there are certain sites that I am completely blocked from, including any site that involves an antivirus.
Lastly, when I do a web search and click on one of the links given, I am redirected to other sites that are usually trying to get me to dl software or buy something. Unfortunately, my pc was recently infected and it is bad.