First of all, your video links don't appear to be showing any Hearthstone related videos. At least they didn't appear so from the thumbnails and, well, I wasn't going to view them all to be sure.

Anyway, this is a very common problem if you're running on Windows 10, or any version with Windows Defender as your primary antivirus. Here's how to be sure that's the problem:

• -Run Hearthstone and Hearthranger until lag appears.
• -Right-click your taskbar and launch Task Manager.
• -Expand Processes view with "More Details" located at the bottom.
• -Sort processes by CPU.

Is Antimalware Service Executable running with a ton of CPU? If so, that's your culprit.

How to fix:

• -In the Windows 10 search field type in "Defender" and launch Windows Defender Security Center.
• -Click on "Virus & threat protection".
• -Click on "Virus & threat protection settings".
• -Scroll down to Exclusions and click "Add or remove exclusions".
• -Click "Add an exclusion" and choose "file" and select "Hearthstone.exe".
• -Do the same for "Hearthranger.exe".
• -For good measure you can repeat this by choosing Folder and excluding the entire folders for Hearthstone and Hearthranger.
• -Reboot.
• -Play.

This should take care of it on a reasonably fast system. If you still experience lag then your only other option is to turn off Real-time Protection for the duration of your Hearthstone/Hearthranger play. You should only do this part if the above didn't work.

• -In the Windows 10 search field type in "Defender" and launch Windows Defender Security Center.
• -Click on "Virus & threat protection".
• -Click on "Virus & threat protection settings".
• -Find "real-time protection" at the top of the list and choose to turn it off.
• -Accept the UAC prompt for admin control.
• -Ignore the warnings of being unprotected for the duration of your play.

This will last until your next reboot or you turn real-time protection back on.

If you do not have Windows Defender and are experiencing this lag, check whatever your antivirus or anti-malware apps you're using and add Hearthstone and Hearthranger to their exception lists.

Enjoy.

Solved problem for me!!! Win 8.1

Turn off the real time protection and works like a charm!!!

THX

I will try the work-around above mentioned, but i have to say, it's disapointing that on a pretty good system the bot is causing these issues. The person that wrote this article mentioned this multiple times and wrote he has had this struggle for a long time. I will try the method to fix the issue, but i actually think (this is a feeling), that it is the bot that sucks too much memory in some way. Thanks for the service though. Kind regards from Holland / The Netherlands.

EDIT:

I was trying all the methods mentioned above and i am afraid the topic starter has a point. There is not really a workaround for this problem it seems. I have opened my defender and i have turned off EVERYTHING. All virus protection and even the firewall. I run a clean install of Windows 7. Not much will open when i run my PC. It's a different one then the one i am on now. It's 100% clean and fresh. Also, i opened task manager and i closed ALL things that used memory that doesnt interfere with the usual stuff to run the pc. It is a bot issue. Also it's not the internet. The internet runs fine. I am thankful for the service but if the bot stays this way i will post my experiences on several forums and tell the people there to NOT USE this software. I expect a patch or solution cus i payed 20 euro's yesterday as a new customer... I don't wanna pay money for something that doesnt work. I would like to have a reply from the developers about what we will do with this.... :/. Very much please.