Uninstalling Firefox may leave the user profile data intact for a reinstall. Suggest uninstalling again and manually deleting all the profile data. Reinstall, which will then create a new user profile. Backup your bookmarks before uninstalling and deleting the profile, so you can import them into the new profile. There's a backup function (and import function) under Bookmarks / Show All Bookmarks. I had a situation recently in which Firefox stopped working with my online banking billpay service. The page would load with no errors but blank. IE worked OK but I refuse to use IE. Just my local bank. Three credit card accounts elsewhere, brokerage account, and other secure sites worked OK. Local bank worked OK with the Firefox Default user, which is not the profile I use for myself. I keep Default bare with no add-ons or bookmarks saved. Apparently something went awry in my user profile. I created a new profile (without reinstalling), copied bookmarks to it from my previous profile, reinstalled my add-ons, and that solved the problem.

Okay, using the Firefox "troubleshooter" I went to plug ins and set and changed "shock waver" from always on to ask. All seems much better - so far. Right now the CPU Utilization is so low the processor speed, a slow 1.4 Ghz is backing down to slower speeds to save power, this is a Laptop and does what it can to extend battery life even if the A/C is attached, or so it seems. I tried to view a video on Youtube and it asked me to enable Shock Wave, I did and the video play normally and the CUP utilization was still well below the old 90% level. This my be the culprit - I wonder what IE does about Shock Wave, I'll try to find out later. Another mystery: HOW DO I BOOT IN SAFE MODE in W8? Yes I know I'm shouting but that's how I feel about Microsoft at the moment, maybe a Mac is in my future, when I'm "rich and famous".

I have had numerous problems in the past, and yes, it does seem like whenever GW plays around with new ads is when I've experienced the most. But for some reason, this time, I'm not having any problems at all and I don't see the ads in the middle of posts you've been talking about. I hope it stays that way, too. I do use Firefox with all the ad blocking goodies, but I'm not up to date on the newest version. I stopped using IE for this site a long time ago. Last week I was having some problems with my computer running very slow to load things and was starting to get aggravated, (this was also just after some automatic updates Windows did) but I ran a scan in my virus protection (it didn't show any reports of any issues) and I also went to Microsoft and ran a free scan there (still no reported problem) then I rebooted (for about the 5th time) and now no problems.

I fear you still have some of the infections still lingering and that could very well be interfering with your installation. I would suggest going to LzD and having Corrine look at your logs she will be able to see if any of the infection is still there and how to remove it. She is great at this she goes step by step as slow as you need. You would not want to risk having infections on it at any rate. Analysis and Malware Removal that is the link to LzD where you can create your own post, you do need to register at the forum and they will email you back. I am there and Corrine will be there to help you. Let us know so we can be watching for you.