Two web sites won't load in any Browser

I forgot to past the message being shown when I try to access those sites, and this was just now which is after I did a restart in safe mode:

FireFox

Secure Connection Failed

The connection to www.homedepot.com was interrupted while the page was loading.

The page you are trying to view cannot be shown because the authenticity of the received data could not be verified.

Please contact the website owners to inform them of this problem.

Learn more…

Report errors like this to help Mozilla identify and block malicious sites

From Chrome (homedepot.com)

This site can’t be reached

www.homedepot.com unexpectedly closed the connection.

Try:

• Checking the connection
• Checking the proxy and the firewall
• Running Network Diagnostics

ERR_CONNECTION_CLOSED

These two same web site are "not" opening on Safari, Firefox, and Chrome. Sitting right next to me, I have a laptop on the same system version, and those two web site "do" open in the PowerBook Pro. This just has to have something to do with me running Etrecheck. After running it is when the issue started happening.

I can only run the version of Safari that runs on Mavericks. I explained why I cannot upgrade from Mavericks. I have thousands of dollars of application software on my iMac that I cannot afford to upgrade or I would move up to Yosemite. Besides the fact, I was having no problems until I ran Etrecheck.

This iMac is in my home and I am the administrator. I have a 100 GB cox connection with a DOCSIS 2.1 modem and an Airport Extreme router running a 5 GHz channel. I have no content blockers running. I use Avast and Malwarebytes. Ran both and neither showed any problems. I have run both of these for years, so they are not the problem. This only happened after running Etrecheck on April 6.

Eric, I sure appreciate your tenacity in hanging in there with me. It is appreciated. The other guy has not responded again.

Avast has kept me from going to dangerous web sites several times a week (once last night). I have been using it for over 2 years and has never caused a problem... however "I will" temporarily uninstall it (and I also know to uninstall it before I install anything new on the computer). I have not run Coctail for over 5 years now, however I did see the 2 trailing files in the Library/LaunchDaemons and I removed them last night. I also ran the Avast Scan last night and it found 7 infections which I deleted (flashPlayer, NGPlayer, 3 attachments on email and a pdf file).

I run Avast because my brother is Vice President of a Educational Security company in Atlanta (Macs) and that is what they use and re recommended it. It has saved me and many of my clients from accessing dangerous web sites on numerous occasions.

I would "NEVER" run CleanMyMac nor MacKeeper and personally believe they are Malware themselves. I lecture my clients about them constantly. What are your thoughts about me running TeamViewer all the time. I only used it with two people and one of them has passed away. The other is my aunt and we don't really need it much.

Did you see anything else in the EtreCheck report that looked troubling or questionable? It is interesting that I have never had this issue until I ran EtreCheck and deleted about 7 "so called" orphan files that were no longer needed. My problem of not being able to access either of the web sites started immediately after I ran that application and deleted those 7 loose files.

Eric, I just went through the Library and found several other trailing files belonging to the old install of Cocktail. They have all been deleted now. I prefer Onyx for running scripts and clearing caches, etc., and have not used Cocktail in probably 5 - 8 years now.

Eric, I uninstalled Avast and Home Depot now loads in all the browsers. BestBuy loads normally in Firefox and Chrome but is a little funky in Safari. I suspect this all occurred as a coincident and that both BestBuy and HomeDepot just updated their browsers on April 6th. Avast must have recognized their certificates changed, and saw them as a threat.

I have been getting a notice from Chase that Safari needs updating, and know I am faced with moving up to Yosemite maybe on my iMac, or using Firefox which I don't like.

Bottom line... THANK YOU SO MUCH for hanging in there with me Eric. You are very much appreciated!

You are apparently on a Windows machine, so I don't see why your fix if relevant to my situation on a Mac. I am also wondering why you are on a Mac Forum. I don't mean this in a negative way at all, so please don't take it as such.