Forgive my ignorance to linked you to your own post, just tried to help
Like I said in the previous comment I am really sorry.
My dad had a pretty decent pc he built and it was supposedly a 64 bit machine but he didn't know apparently and installed windows xp 32 bit.
I recently upgraded to windows 8 pro 64 bit and it worked great (installing) but has been a challenge getting old programs I love working, my recording and gaming gear set up. SO when avast turned things all around I got frustrated and annoyed.
Wanting to install 8.1 is stressing me out even more. Not trying to make excuses for my words just explain myself and apologize. Is there a way to delete your thread here? If not I guess my attitude will remain for all to see at least I can admit fault and apologize.
On another note. I restarted firefox and chrome various times throughout posting here today and about 5 minutes ago when I opened firefox again the install for one of the plug ins appeared. I found it odd and very random. I wonder if possibly all the confusion here (I'm not the only one posting about the apps) had them do a small update or something that kicked the prompt in?
On another note you can install the adblocker from avast through your c drive in the avast program folder, go to adblocker locate the corresponding browser and drag the file inside the folder to your browser (it should prompt the browser to install the plugin - this does not work for the internet security plugin).
One issue I found with the internet security program but also have a complex work around is that it attempts to block tracking sites etc. but it was breaking websites (like the southpark video site for instance as there videos don't play correctly without adds) - I tried un-checking all the boxes and reloading theoretically unblocking the ads and tracking sites but it still wasn't working. I then tried disabling those settings in the plugins options and it still didn't work. Finally I disabled the plugin and the commercial loaded allowing the episode to play.
So my workaround involves using ghostery (a more in depth but less user friendly version of what the avast plug in tries to accomplish - i prefer the avast's simplicity and wish ghostery had them organized in the same manor) anyways I use ghostery for the same security purposes when avast is disabled (as it only interferes with some and like I said it's simpler than ghostery) and disable ghostery and re-enable the avast plugin when not using a site it breaks. So that's my work around odd as it is.
I hope that makes sense. Long winded I know but it's been a long, challenging day. You may ask why I want this plugin so bad if it breaks sites? I haven't found a web rating site that displays ratings for pages on google search since I stopped using WebOfTrust. The avast plugin does the same thing but better in my opinon as WOT is purely based on opinion and false positives many safe sites. I for some reason feel a little safer browsing random websites with that avast symbol giving me a little heads up.
I also now use webutation which is great as it gets it's info from antivirus sites, google scans and WOT to name a few - the problem with webutation is it doesn't give it's rating until after you load a page.
Anyways, Sorry again and sorry for this last rant but I hope if anyone understands any of it (I am so tired rite now) I hope it may help someone.
- Peace