Cybertooth

I went ahead and uninstalled, then reinstalled, the version that I currently have (4.0.95). The icon is back and the GUI is working again. But they already disappeared once, so we will see how long they last. BTW I visited, in Windows 7 on a different computer, the same Downloads page that was linked to above, and it too gives version 4.0.90 as the only choice for downloading.

Of the three choices listed in the post above, which one should I go with? My preference would be to use a direct download link to the new version, to avoid this weird issue where I'm not seeing the correct one (4.0.96) on the download page. Second choice would be to reinstall my current version. If the version on the downloads page is indeed 4.0.90, I would rather not install that one because that version made my Chromium-based browsers crash repeatedly. A fix for that was issued in a later version of ESET for Linux.

Yes, very strange. I can't imagine what could be going on. I even tried visiting that page using a different browser (Pale Moon) and got the same result, 4.0.90.0. OK, so it looks like I have three choices: Uninstall the current broken version and then reinstall it. (I think that's the "en95" 64-bit file mentioned above.) Install the 64-bit version from the downloads page that may or may not be version 4.0.90.0. Use a direct link (if you have a way to provide one) for the 64-bit 4.0.96 version.

I posted it above as an embedded link, but here it is again: https://www.eset.com/us/home/antivirus-linux/download/

Weird, I am not getting any choices for 4.0.96, only for 4.0.90: Whether I select the 32-bit or the 64-bit version in the dropdown menu, it's still 4.0.90 and not 4.0.96.

After uninstalling, would you recommend that I download a new copy from this page, or that I re-install the copy I already have in my Downloads directory? The difference is not trivial. The ESET downloads page says that file is version 4.0.90.0 with a filename of eset_nod32av_32bit_en_.linux (file size 83.6 MiB), while the program file I already had in the Downloads directory is eset_nod32av_64bit_en95.linux (file size 103.9 MiB). Which one should I use when reinstalling? Thank you.

Since I cannot carry out the instructions (as described in my previous post), is there anything else I can do to fix this problem?

Thank you for the new set of instructions. Two notes about the new instructions: I don't have a directory named "modules" under /var/opt/eset/esets/lib/. There is only a "data" subdirectory and several files with names em0XX_32.dat. I tried to delete the contents of /var/opt/eset/esets/lib/data/updfiles/ in Dolphin by using Ctrl-A and then Delete, but nothing happened, they are all still there.

My directories are structured the same way as those of @Malzahn. That is, I don't have a "modules" directory under /var/opt and the only one there is "data". Nor is there an "esets_update" file under /opt/eset--my files there match Malzahn's. I haven't tried removing any files anywhere. The log files show thousands of instances of a sequence that runs as follows: Nov 20 09:30:28 xxxxxxxx systemd[1]: Starting ESET NOD32 Antivirus... Nov 20 09:30:32 xxxxxxxx systemd[1]: esets.service: Control process exited, code=dumped status=11 Nov 20 09:30:32 xxxxxxxx systemd[1]: esets.service: Failed with result 'core-dump'. Nov 20 09:30:32 xxxxxxxx systemd[1]: Failed to start ESET NOD32 Antivirus. Nov 20 09:30:32 xxxxxxxx systemd[1]: esets.service: Service hold-off time over, scheduling restart. Nov 20 09:30:32 xxxxxxxx systemd[1]: esets.service: Scheduled restart job, restart counter is at 8572. Nov 20 09:30:32 xxxxxxxx systemd[1]: Stopped ESET NOD32 Antivirus. And then the cycle immediately starts over again with the first line.

Thanks, but I had never heard of "libappindicator1". I tried searching for it from the Search window in the Application Menu, but there were no results. After using ESET for Linux for two years, I don't understand why suddenly now I would need this to get the icon to show up. Anyway, I tried the instructions in the link you provided; libappindicator1 and libappindicator7 got installed, but the ESET icon did not appear. Do I need to reboot?

Tonight I went back to the computer and found the desktop very sluggish when not simply unresponsive. Clicking on items in the taskbar would either do nothing, or open the programs extremely slowly and then the windows would not finish opening. I ended up doing a hard reboot, but just as I was releasing the power button I noticed that the ESET NOD32 Antivirus for Linux icon in the notification area looked red. After rebooting, the system works normally -- except that the ESET icon is no longer showing up in the notification area. And clicking on ESET from the Application menu does not open the GUI. However, I can see the ESET processes running in KSysGuard. I am using Kubuntu 18.04 LTS with Plasma version 5.12.9. I think I am on ESET for Linux version 4.95, but I can't remember for sure and of course I can't call up the GUI to verify. What can I do to get the GUI back? As a Windows refugee, I don't know how else I would make use of the program. Thanks for any tips or suggestions.