AvastUI.exe * 32 always uses 25% of cpu's resources.

Avast Free Antivirus / Premium Security
1

It has occurred since April 6.
AvastUI.exe * 32 always uses 25% of cpu’s resources.
I am not running the scan.
It will not fix after reinstalling.
There are no other installed software.
Is there a solution?

This sentence is translated from Japanese to machine.
I am sorry if it is difficult to read.

2

Hi,
when you see 25% of cpu resource for avastui.exe process, can you please run Task Manager (taskmgr.exe), right click on this process and select “Create dump file”? Please compress this file (e.g. zip/rar or 7zip) and upload it on our ftp (https://support.avast.com/en-ww/article/FTP-file-upload). Thanks!

3

I’m experiencing the same behaviour after updating to program version 18.3.2333. Avast is using up to 30+% CPU time while I have not “instructed” Avast to perform any actions.
I have already tried to repair my installation but that didn’t help.
I’m running Windows 10 Pro including Avast Premier including an active subscription.
Any ideas?

4

Yes, follow pk’s (an Avast Team Member) request for information when the CPU % is high.

5

Information has been submitted to the Avast FTP server.

Filename: xander.kort@x-on.nl.zip
Password: virus

Please keep me updated towards a resolution.

6

Thanks, hopefully pk can pick up on this for the Avast Team.

7

Any news on this topic?
It is rather annoying as the fan inside my Surface Pro 3 is running at higher speed and thus making noise as a result of the increased 30+% CPU resources.

8

Hello,
the CPU is consumed by thread :
00 0f9cfc38 73e8cce6 54f4257d a19e0fe1 6632c59c ntdll_76f90000!NtYieldExecution+0xc
*** ERROR: Symbol file could not be found. Defaulted to export symbols for AcroRdIF.dll -
01 0f9cfc3c 54f4257d a19e0fe1 6632c59c 6632c59c KERNELBASE!SwitchToThread+0x6
WARNING: Stack unwind information not available. Following frames may be wrong.
02 0f9cfc68 6632c556 00000000 cd06c41a 6632c59c AcroRdIF!DllCanUnloadNow+0xefb
03 0f9cfca0 6632c600 6632c59c 0f9cfcc0 74038654 msvcr100!_callthreadstartex+0x1b
04 0f9cfcac 74038654 0f9d6858 74038630 e63bfc17 msvcr100!_threadstartex+0x64
05 0f9cfcc0 76ff4b17 0f9d6858 a07f8235 00000000 kernel32!BaseThreadInitThunk+0x24
06 0f9cfd08 76ff4ae7 ffffffff 77019f61 00000000 ntdll_76f90000!__RtlUserThreadStart+0x2f
07 0f9cfd18 00000000 6632c59c 0f9d6858 00000000 ntdll_76f90000!_RtlUserThreadStart+0x1b

C:\Program Files (x86)\Adobe\Reader 11.0\Reader\AcroRdIF.dll

Loaded symbol image file: AcroRdIF.dll
Image path: C:\Program Files (x86)\Adobe\Reader 11.0\Reader\AcroRdIF.dll
Image name: AcroRdIF.dll
Browse all global symbols  functions  data
Timestamp:        Mon Sep 24 04:47:21 2012 (505FC9B9)
CheckSum:         0001B3AF
ImageSize:        0001A000
File version:     11.0.0.379
Product version:  11.0.0.379
File flags:       0 (Mask 3F)
File OS:          40004 NT Win32
File type:        2.0 Dll
File date:        00000000.00000000
Translations:     0409.04b0
CompanyName:      Adobe Systems, Inc.
ProductName:      Adobe PDF IFilter
InternalName:     PDFFilter
OriginalFilename: AcroRdIF.dll
ProductVersion:   11.0.0.379
FileVersion:      11.0.0.379
FileDescription:  PDF IFilter
LegalCopyright:   Copyright 1984-2012 Adobe Systems Incorporated and its licensors. All rights reserved.

Please try to update adobe reader to resolve the issue.
Thank you.

9

A Japanese user also reported this issue. I suggested to update Adobe Reader and will report back.

Edit: 4/13 23:27 In his/her case Adobe Reader seems not related. Uninstalling Adobe Reader does not solve his/her issue.
Edit2: 4/14 1:03 A Japanese user having the same issue uploaded dump files to the ftp. filename: AvastUI_ume3.zip pass: 218218
10

Repairing Adobe Reader XI didn’t have any affect.
Removing Adobe Reader XI presents an error in regards to files being in use by Avat Antivirus, see attachment.
As I can’t turn Avast off at this point would I like to know how to continue.

11

Changed Avast to passive mode, rebooted, removed Adobe Reader XI, changed Avast to active mode and rebooted.

Now Avast Antivirus reports to use hardly any CPU resources. However, the CPU usage remains quite high and now Windows installer reports a CPU resource usage of 30%.

This behaviour started after updating Avast to program version 18.3.2333.

Any idea what is causing this strange behaviour?

12

Hi Non
in your case it seems that there is Datascan thread which consumes CPU. I would try to disable datascan for a while - it might help
Thank you

13

Thanks, I forwarded this to the OP.

14

Hi kwiq, the OP claims there is no way to stop “Datascan” (I believe this refers to “Sensitive Data Scan”) because he/she users Free version of Avast, thus no way to stop/uninstall this component.

15

Avastui.exe grabs close to 100% of my cpu upon booting.

I’m using Avast Free 18.3.2333 on up-to-date XP SP3.

I have zipped AvastUI Minidump.dmp and AvastUI Full Dump.dmp into the folder Dumps of avastui.zip and sent it per PK’s instructions to the Avast Team FTP server, incoming directory. The upload was apparently successful.

Thanks, folks…

16

Hi lanshark4972,
I found ‘Dumps of avastui.zip’ folder.
It looks like there was DataScan task running in background.
To conffirm it please disable avast self defense for a while and rename aswDataScan.dll → aswDataScan.dll.org (C:\Program Files\AVAST Software\Avast\aswDataScan.dll) than enable self defense
and restart Avast UI.
Let us know if it helped you.
Thank you

17

You nailed it, kwiq; thanks! I did what you suggested, rebooted, and that rascal avastui is nowhere to be seen. Moving right along: is there any problem with aswDataScan.dll being disabled?

18

Yesterday:

Today:

  • AvastUI.exe now runs only 3 seconds or so, then quits with no errors, both at boot and when manually clicked.
  • The Avast tray icon then remains but disappears upon mouseover so I have no way to see the UI–if it is running…
  • Avastsvc.exe continues to run as a task, but Task Manager shows no cpu usage when I check it.
  • AvLaunch.exe does nothing that I can see, and shows as v18.3.3860.0

Questions:

  • Is Avast providing me active protection now?
  • How do I get to my UI?

Using XP SP3 up-to-date & Avast Free 18.3.3860.316

19

Hi lanshark4972,
you can always rename aswDataScan.dll back and see if AvastUI.exe runs.
start “c:\Program Files\AVAST Software\Avast\AvastUI.exe” process.

It seems that AvastUI.exe depends on aswDataScan.dll :-(.
I will ask my workmate how to disable datascan and not break UI.
Thank you

20

Thank you, kwiq; remember that, in spite of the title of this thread, avastui uses just about 100% of my cpu
, so reenabling aswDataScan.dll doesn’t seem like a good idea. Let’s hope that your workmate is successful.