Author Topic: Avast pop up windows blocks ultravnc teamviewer etc.  (Read 9055 times)

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Offline especially

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Avast pop up windows blocks ultravnc teamviewer etc.
« on: March 18, 2018, 08:55:55 PM »
I saw a previous post on this topic that was started in december, but when someone added to it today, poster was told to start a new topic. This is happening on my machine windows 7 64bit. Tried the "emergency update", uninstalled, reinstalled, but every time an avast window pop ups, I lose mouse and keyboard inputs. Also uninstalled reinstalled uvnc, tried 32bit and 64bit versions, went back to older versions of uvnc, still same behavior. Cannot send ctrl/alt/del with the Avast window open.

If I open the chat window and press the send key about 10 to 20 times, i get one shot to close avast window, but as soon as another Avast pop up window opens, same thing happens, lose mouse and keyboard control. It looks like this has been an issue since back in November. Does anyone have a fix, besides disabling Avast (not really a fix).

And what is up with these verification images, have to reset that 5 to 10 times before it can be read?

Offline Asyn

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Re: Avast pop up windows blocks ultravnc teamviewer etc.
« Reply #1 on: March 19, 2018, 04:51:05 AM »
And what is up with these verification images, have to reset that 5 to 10 times before it can be read?
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Offline mitchkebie

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Re: Avast pop up windows blocks ultravnc teamviewer etc.
« Reply #2 on: March 27, 2018, 04:35:00 PM »
Sounds like you have a case of the Avast blocking stuff! I had to completely uninstall my paid version of Avast so I could actually use software on my computer. Not even disabling the shields helped, a complete disable/uninstall was the only fix.

Offline bob3160

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Re: Avast pop up windows blocks ultravnc teamviewer etc.
« Reply #3 on: March 27, 2018, 06:23:53 PM »
Sounds like you have a case of the Avast blocking stuff! I had to completely uninstall my paid version of Avast so I could actually use software on my computer. Not even disabling the shields helped, a complete disable/uninstall was the only fix.
Sounds like a case of using drastic measures instead of getting help.
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Offline John Becich

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Re: Avast pop up windows blocks ultravnc teamviewer etc.
« Reply #4 on: April 19, 2018, 06:22:11 PM »
Avast isn't listening, and obviously doesn't care.     It's the bigger player in this matter of incompatibilities.       UltraVNC doesn't care, or is helpless to remedy this.         
"What we have here is a failure to communicate!"
Can anyone tell us if Windows 10 Remote Desktop remains free of this problem that so severely affects UltraVNC?
« Last Edit: April 19, 2018, 06:36:08 PM by John Becich »

Offline bob3160

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Re: Avast pop up windows blocks ultravnc teamviewer etc.
« Reply #5 on: April 19, 2018, 06:38:52 PM »
Avast isn't listening, and obviously doesn't care.     It's the bigger player in this matter of incompatibilities.       UltraVNC doesn't care, or is helpless to remedy this.         
"What we have here is a failure to communicate!"
Can anyone tell us if Windows 10 Remote Desktop remains free of this problem that so severely affects UltraVNC?
Quick Assist working without problems for me.

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Offline igor

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Re: Avast pop up windows blocks ultravnc teamviewer etc.
« Reply #6 on: April 19, 2018, 11:17:40 PM »
We haven't been able to reproduce the described issue, sorry.
For any report, please pack the main executable of the blocked tool (if unsure, the whole folder) and upload it somewhere - so that we can check how Avast classifies it. However, I'm afraid we haven't found any problem so far.

Remote Desktop certainly isn't affected by self-defense, it works differently (if you have Avast firewall, you may have to allow RD connections first though.)

Offline wakemaker

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Re: Avast pop up windows blocks ultravnc teamviewer etc.
« Reply #7 on: May 07, 2018, 06:57:15 PM »
I have this problem also. I use Splashtop Business to remote into about 75 computers. These pc's have a variety of Window's OS's.

If I try to disable Avast shields by right clicking on the Avast icon in the taskbar, I get the pop-up menu, then I can't do anything with the mouse or keyboard. The way out is to use the Splashtop interface on my end to send control-alt-delete and then log off or switch user on the remote end.

Disabling the Avast self defense module can't be done remotely. Several of the pc's I monitor are headless servers and are hundreds of miles away.

Splashtop does have a command to restart the remote pc in safe mode with networking and also starts Splashtop in this mode. Avast can be removed and Avast Clear can also be run from this mode. This is what I have done on the servers and will remove Avast from the others as well.




Offline dkeithmaxwell

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Re: Avast pop up windows blocks ultravnc teamviewer etc.
« Reply #8 on: June 01, 2018, 09:06:25 PM »
I have the same problem as well.  I manage multiple clients using Splashtop Business and for clients that use Avast free and Avast Premier, initiating any user interface from Avast apps completely kills remote keyboard or mouse input.  There was a similar issue back in November (see: https://forum.avast.com/index.php?topic=210715.0) that was supposedly remedied, but its now May and this problem affects my clients with the latest versions of Avast supposedly installed.

Offline Peter427

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Re: Avast pop up windows blocks ultravnc teamviewer etc.
« Reply #9 on: July 02, 2018, 11:26:43 AM »
I have the same problem using UltraVNC.

- System Information
Windows Server 2012 R2 Standard
Avast Business Security 18.4.2534 (build 18.4.3895.327)
Virus definition 180702-0
TeamViewer Host 9.0.32494 (http://www.teamviewer.com)
UltraVNC Server 1.2.2.1 (http://www.uvnc.com)

UltraVNC is a code-signed executable.
It seems that UltraVNC is not in the list of trusted files because Team Viewer is working properly.

Offline John Becich

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Re: Avast pop up windows blocks ultravnc teamviewer etc.
« Reply #10 on: July 26, 2018, 05:44:10 AM »
Thank you, Peter427, for the encouragement.    I have another "distant" Windows computer, this time it's a Windows 7 Pro host/server for UltraVNC, which is stymied as soon as the Avast control panel is raised.    But TeamViewer host/server works on that same computer without any snags whatsoever.

Offline John Becich

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Re: Avast pop up windows blocks ultravnc teamviewer etc.
« Reply #11 on: July 26, 2018, 05:23:27 PM »
Thank you, Bob3160.       I have tested (on one host Win10 computer) and agree that Quick Assist is unencumbered by Avast.

Offline charlierainbow

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Re: Avast pop up windows blocks ultravnc teamviewer etc.
« Reply #12 on: July 26, 2018, 07:48:17 PM »
I'll put my name in the ring here, too. Using UVNC 1.2.2.1, windows 7 ultimate, Avast Free, everything up to date as of this posting. See, for instance:

https://forum.ultravnc.net/viewtopic.php?f=3&t=34015

It's very frustrating that this problem persists. Someone at Avast please help!

Offline bob3160

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Re: Avast pop up windows blocks ultravnc teamviewer etc.
« Reply #13 on: July 26, 2018, 10:36:06 PM »
Again reported to Avast on the Developers Channel. Let's hope that helps.
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Offline especially

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Re: Avast pop up windows blocks ultravnc teamviewer etc.
« Reply #14 on: July 28, 2018, 08:40:58 PM »
This workaround seems to work for now. Open Ultravnc and connect to the remote machine.

If the Avast window pops up, you can no longer control the remote computer. CTRL/ALT/Delete will not work.

Open the chat window. Click "send" (no need to enter text, just click send).

For some reason, you can now use CTRL/ALT/DELETE from the UltraVNC window (top left icon).

Start Task Manager. You should see Avast in the list of programs. End Avast. The pop up Avast window should disappear. This does not stop the Avast program from running, but it just closes the Avast Pop up and you should have control of theremote  machine again.