If someday you are stuck on "Updating Battle.net Agent"

[Boxer]

Hello folks,
Some of you maybe heard about my struggle with Bnet Agent to make it work on my 2cond computer.Its been gone 3 weeks now.
I have instaled it on my laptop and worked just fine with no issues, but on the PC desktop...no way! 

So my problem was :

After running the executable to install the client with the installer, or even running Battle.net from a folder copied from a working PC, starting Battle.net lingers for like a minute then t changes to Updating Battle.net and gets stuck halfway through. If i wait long enough (around 3-4 minutes) I get an error: Whoops! Looks like something is broken etc.
In addition, the installer tends to create multiple instances of Agent.exe in the process tree, which i can't close with end process. It sometimes creates more than 3 copies of Agent.exe.

What i have done :

-Deleting Battle.net and Blizzard related folders in ProgramData, ProgramFiles(x86), Appdata and trying to install again.
-Copying these folders from another computer which runs HS normally.
-Using another network or using Google DNS.
-Disabling Firewall/Avast Antivirus
-Cleanup with CCleaner & Malwarebytes
-Deleting Battle.net related registry keys before reinstalling.
-Resetting Internet Explorer settings and proxy settings.
-ipconfig /release and ipconfig /new in cmd.
-winsock reset in cmd.
-Updating Adobe Flash
-Enabling Secondary Logon
-Tried Selective startup
-Tried installing in safe mode
-Tried basically everything in the official troubleshooting pages.
-Replaced the folder in ProgramData with the folder downloded from the manual patching page.
-Firewall, Proxy, Router and Port Configuration: adding TCP and UCP ports

• Battle.net Desktop Application    80, 443, 1119 and 6881-6999    80, 443, 1119, 6881-6999

• Blizzard Downloader    1119, 1120, 3724, 4000, 6112, 6113, 6114, 6881-6999    1119, 1120, 3724, 4000, 6112, 6113, 6114, and 6881-6999

• Hearthstone    1119, 3724    1119, 3724

• World of Warcraft Launcher and Game Client    3724, 1119, 1120, 4000, 6112, 6113, 6114, 80, and 6881-6999    3724, 1119, 1120, 4000, 6112, 6113, 6114, 80, and 6881-6999

Results:
Nothing !









SOLVED:

Completely deleting Avast antivirus solved the problem.

PS.
I use Avast on my laptop also, and worked from the first time without disable anything and without doing nothing.

[Grodahun]

Glad you have been able to fix this problem. It can be soooo frustrating, especially if everything looks the same on both computers.