Problem when performing the scanning.

Avast Free Antivirus / Premium Security
1

I have an Internet Security installed, with the version 19.1.2360 build 19.1.4142.0

When I ask to perform an scanner it will stop at roughly the 78% mark, and then my whole computer slows down to near inactivity. That never happened before, and it was just fine the previous week.

Did anybody report a similar error?

I currently posses Windows 10 that is up to date.

2
  • OS…? (32/64 Bit…? - which SP/Build…?)
  • Other security related software installed…?
  • Which AV(s) did you use before Avast…?
3

Windows 10 Home Single Language, 64bits.

I also have Spybot S&D2 free version installed. No other security related programs are installed.

Windows is up to date, Avast is up to date.

EDIT: I uninstalled the Spybot S&D2 and performed a scan again, it still grinds to a halt at roughly 76-78%

4
  1. Download Avast Internet Security: https://files.avast.com/iavs9x/avast_internet_security_setup_offline.exe
  2. Follow instructions: https://www.avast.com/uninstall-utility (Run this tool for all prior installed Avast versions…!!)
  3. Reinstall Avast with the downloaded installer from point 1.
  4. Reboot.
5

I re-installed it following the instructions, but then it started to slow down to a halt once more when I reinstalled it.

For now I will wait until a new version comes around. Also can I send my problem to someone more higher up so that they an properly document it?

6

Contact support: https://support.avast.com/contact

7

Spybot has been known to cause problems. You may want to remove it and replace it
with the free version of Malwarebytes.
https://www.malwarebytes.com/mwb-download/

8

I have the exact same issue, except I’m on Windows 7 Ultimate 64-bit. When the scan reaches 78 percent, memory usage rises up to around 99-100% and you can’t do anything but restart your computer or wait for about an hour till it ends.

9

Would you be able to create a dump of the relevant process (probably AvastSvc.exe?) at the moment of high memory usage (e.g. via Task Manager - rightclick the process and choose Create Dump File), compress it and upload it, under a unique name, to ftp://ftp.avast.com/incoming ?
Thanks!

10

I doubt this is normal, but I went and checked the Avast log folder and I see two files that were created during the time when my memory was at 100% use and they are huge - 4,40 GB each. The type of those files is MDMP file.
Does that mean something?

11

It means that Avast probably detected that it’s using a suspiciously big amount of memory at the time and created a dump itself (there’s a “watchdog” for that).
Those dump files could tell us what was going on when the big memory allocation was happening and point us to the actual cause (though that assumes that the dump was created in the middle of the operation… if there was a leak, for example, meaning some memory is allocated and then forgotten - and left forever - the dump could be created later and the problematic action long gone. But if you say the memory goes back to normal after the scan, chances are it’s not a leak but rather a operation that the dump recorded).

Of course, we would need to see at least one of those dumps to say more. I would say the dump files should be well compressible - if you compress it using 7-Zip (or even ZIP), I think it would go down a several hundreds of megabytes.

12

Okay, I’ll try and upload the compressed file sometime over the weekend. Could you only give me instructions on how to upload the file to that link you posted or can I upload to some other file hosting site if it’s easier?

13

Hi, see: https://support.avast.com/article/160/

14

Sure you can upload it to some other file hosting… just let me know where to find it.

15

Hi, igor. I PM’d you the link to the dump file.