Hi
Since 2 weeks ago Avast began to invite me to restart the computer after definition updates by streaming . I wanted to ask you which could be the problem.
I tried to analyze the problem and I saw that when the computer starts from the beginning with the first update definition it doesn´t ask me to restart.
The alert appears later with the next definitions updates by streaming and when I open the firefox browser (version 100.0).
I don´t have the last version of avast because I have Windows 7 operating system and prefer to maintain the old version.
Could be possible that with the definition updates you also were sending web shield updates and that this could be the reason of the problem?
I wuld be very grateful if you help me.
Many thanks!!!
Hello!
Sadly, you won't be able to get any official help from anyone, including the Developers about this issue, as I already tried many times, and they weren't able to help me or even explain what's going on.
My conclusion was: it's related to using Windows 7, which they consider too obsolete to care about.
I do have a solution though, if you're interested. 
Of course, you should understand what you're doing, since it might (in theory) make you a bit more vulnerable (but the same thing can be said about using older versions of Avast, so you should be fine actually).
Firstly, see this post of mine, here:
https://forum.avast.com/index.php?topic=319628.msg1687784#msg1687784Also, later I figured out that it could also be the Emergency update issue (on computers with Windows 7).
So, a sure way to solve this rebooting issue on Windows 7, is to disable BOTH tasks in Task Scheduler, including Overseer and Emergency update.Considering, you said you keep running the older version of Avast, this action will not change your protection level or risks whatsoever.
But the rebooting requests will stop, after you do your very last requested reboot, after disabling those tasks.
Instructions:This article should help you how to find and open the Task Scheduler:
https://www.digitalcitizen.life/ways-start-task-scheduler-windows/The "Avast Emergency Update" task is located in the "Task Scheduler Library" section (select it by clicking, to see the list of tasks for it).
The "Overseer" task is located in the "Task Scheduler Library > Avast Software" subsection (select it to see the tasks).
Right click on each of those tasks and in the pop-up menu click the "Disable" option.
Veryfy the status of each task in the task list field, so that it says that it's "Disabled".
Close the "Task Scheduler" and Reboot your computer.
Your problem will be solved.
And the virus definitions updates will work just fine, without asking you to reboot every time.
P.S.
I don't use the option "Enable streaming updates" myself, so I don't know if having it checked would prevent my solution from working. But you can test it first. Maybe it will work with that option checked just fine.
The definitions update doesn't just include the virus signatures it also includes Engine updates, which might require a restart to take effect.
Oh, don't worry. That's actually a lot simpler, as you can see from the beginning of my reply.
Windows 7 exclusive issue, which won't ever be resolved because the developers don't really care about that old OS all that much. (I can understand why, though.)
At least it's possible to fix it the way I described above.