Avast causes slow boot and black screen

Avast Free Antivirus / Premium Security
1

I have installed Avast free then my PC is slowed down so much at boot with a black screen after Welcome screen.
I have run into this problem many times and many years ago (from 2013). Every time I re installed my Windows 7 and then installed Avast, it happened. By investigating the boot procedure (using Windows Performance Tools Kit from Microsoft), I’m sure it’s caused by Avast. To make sure this is true, I re-installed my Windows 7 (format the whole HDD), then get updates from Microsoft, installed all necessary softwares. Everything is fine. Just right after I installed Avast, it happens.
Watch the video carefully: https://www.youtube.com/watch?v=TAPfVzApI3g

All settings are default. I just install File system shield, Behavior shield and Web shield.

Feel free to get more information from me.

2
  • Which version of Avast Free…?
  • OS…? (32/64 Bit…? - which SP/Build…?)
  • Other security related software installed…?
3

I use the latest version 17.5.2303 with only 3 shields installed, Windows 7 pro 64 bit SP1
I use MalwareBytes but just free version (Real time protection is disabled by default of this version, it won’t start at Windows), no others security sofwares
The HDD is about 80-100% disk usage during the black screen.

4

Regarding Avast & MBAM, see: https://forums.malwarebytes.com/topic/200324-exclusions-for-avast-users/

5

Thank you for your reply. I have done those steps. But after two restarts, problem’s still there :frowning:

6

How do you know the disk is used that much if the screen is black ?

7

Follow instructions: https://www.avast.com/faq.php?article=AVKB33#artTitle

8

Eddy: I look at the HDD LED
Asyn: I will do this

9

Same here, but it happened only once. It was first out of 3 reboots.
Maybe it was emergency update or something.

Avast Free 17.5.2303
Windows 7 x86

10

I have run Avast support tool. It found nothing wrong.
Today, it still happens to me. very long boot.

11

Check your HDD health. It could be failing.

12

You could try the latest beta: https://forum.avast.com/index.php?board=15

13

The black screen still appears on the beta version :frowning:
here is my startup programs and installed programs lists

No	HKCU:Run	f.lux	f.lux Software LLC	"C:\Users\Duong\AppData\Local\FluxSoftware\Flux\flux.exe" /noshow
Yes	HKCU:Run	ShowBatteryBar		"C:\Program Files\BatteryBar\ShowBatteryBar.exe" show
No	HKLM:Run	ATKMEDIA		C:\Program Files (x86)\ASUS\ATK Package\ATK Media\DMedia.exe
No	HKLM:Run	ATKOSD2		C:\Program Files (x86)\ASUS\ATK Package\ATKOSD2\ATKOSD2.exe
Yes	HKLM:Run	AvastUI.exe	AVAST Software	"C:\Program Files\AVAST Software\Avast\AvLaunch.exe" /gui
No	HKLM:Run	HotKeysCmds	Intel Corporation	"C:\Windows\system32\hkcmd.exe"
Yes	HKLM:Run	IAStorIcon	Intel Corporation	"C:\Program Files\Intel\Intel(R) Rapid Storage Technology\IAStorIconLaunch.exe" "C:\Program Files\Intel\Intel(R) Rapid Storage Technology\IAStorIcon.exe" 60
No	HKLM:Run	IgfxTray	Intel Corporation	"C:\Windows\system32\igfxtray.exe"
Yes	HKLM:Run	Persistence	Intel Corporation	"C:\Windows\system32\igfxpers.exe"
Yes	HKLM:Run	USB3MON	Intel Corporation	"C:\Program Files (x86)\Intel\Intel(R) USB 3.0 eXtensible Host Controller Driver\Application\iusb3mon.exe"
No	HKLM:Run	Wondershare Helper Compact.exe		C:\Program Files\Common Files\Wondershare\Wondershare Helper Compact\WSHelper.exe


Apple Mobile Device Support	Apple Inc.	23/08/2017	27,4 MB	10.3.2.3
Apple Software Update	Apple Inc.	23/08/2017	2,70 MB	2.3.0.177
ASUS Smart Gesture	ASUS	14/08/2017	49,2 MB	2.2.8
ATK Package	ASUS	14/08/2017	17,7 MB	1.0.0037
Avast Free Antivirus	AVAST Software	28/08/2017		17.6.2308
BatteryBar (remove only)		21/08/2017		
Bonjour	Apple Inc.	23/08/2017	2,01 MB	3.1.0.1
CCleaner	Piriform	14/08/2017		5.32
f.lux	f.lux Software LLC	14/08/2017		
Foxit Reader	Foxit Software Inc.	17/08/2017	116 MB	8.3.1.21155
Google Chrome	Google Inc.	14/08/2017		60.0.3112.101
Hỗ trợ Ứng dụng Apple (32 bit)	Apple Inc.	23/08/2017	127 MB	5.6
Hỗ trợ Ứng dụng Apple (64 bit)	Apple Inc.	23/08/2017	143 MB	5.6
Intel(R) Management Engine Components	Intel Corporation	14/08/2017		8.1.0.1281
Intel(R) Processor Graphics	Intel Corporation	14/08/2017		10.18.10.3308
Intel(R) Rapid Storage Technology	Intel Corporation	14/08/2017		12.8.0.1016
Intel(R) USB 3.0 eXtensible Host Controller Driver	Intel Corporation	14/08/2017		1.0.3.214
iTunes	Apple Inc.	23/08/2017	429 MB	12.6.2.20
K-Lite Codec Pack 13.4.3 Basic	KLCP	14/08/2017	40,0 MB	13.4.3
Macrium Reflect Free Edition	Paramount Software (UK) Ltd.	24/08/2017		6.3
Malwarebytes version 3.1.2.1733	Malwarebytes	14/08/2017	161 MB	3.1.2.1733
Microsoft .NET Framework 4.5.2	Microsoft Corporation	14/08/2017	38,8 MB	4.5.51209
Microsoft Office Standard 2010	Microsoft Corporation	14/08/2017		14.0.7015.1000
Microsoft Visual C++ 2010  x64 Redistributable - 10.0.40219	Microsoft Corporation	14/08/2017	13,8 MB	10.0.40219
Microsoft Visual C++ 2010  x86 Redistributable - 10.0.40219	Microsoft Corporation	14/08/2017	11,1 MB	10.0.40219
Microsoft Visual C++ 2015 Redistributable (x86) - 14.0.24215	Microsoft Corporation	21/08/2017	21,5 MB	14.0.24215.1
Pro Evolution Soccer 6	KONAMI	27/08/2017		1.00.0000
Qualcomm Atheros Bluetooth Suite (64)	Qualcomm Atheros Communications	14/08/2017	88,0 MB	8.0.1.306
Qualcomm Atheros Client Installation Program	Qualcomm Atheros	14/08/2017		10.0
Realtek Card Reader	Realtek Semiconduct Corp.	14/08/2017	14,6 MB	10.0.10586.27055
Realtek Ethernet Controller Driver	Realtek	14/08/2017		7.48.823.2011
Realtek High Definition Audio Driver	Realtek Semiconductor Corp.	14/08/2017		3.90
Skype™ 7.39	Skype Technologies S.A.	21/08/2017	91,3 MB	7.39.102
SynthFont		22/08/2017		
Windows Driver Package - ASUS (ATP) Mouse  (11/20/2013 1.0.0.194)	ASUS	14/08/2017		11/20/2013 1.0.0.194
WinRAR 5.50 (64-bit)	win.rar GmbH	14/08/2017		5.50.0
Wireless Console 3	ASUS	14/08/2017	9,35 MB	3.0.47
Wondershare Filmora(Build 8.3.1)	Wondershare Software	15/08/2017	654 MB	
Wondershare Helper Compact 2.5.2	Wondershare	15/08/2017	6,61 MB	2.5.2
µTorrent	BitTorrent Inc.	28/08/2017		3.5.0.43916
14

I just have two fast boot without black screen after several restart times.
Let me take a look for a few days about this

15

OK, report back…

16

after a few days, It seems that it still happens, about 50% of the boot times.
I have run into this problem for 3 years. Two years ago, I installed another Win 7 on the same HDD to investigate more deeply. The second Win 7 has Avast installed and actually, it rarely has a black screen and the boot isnt really slow.
Here is the race between the two Win 7 on my laptop
https://www.youtube.com/watch?v=uxI7kgobTDg

I don’t know if my files or any specific can affect. On my main Win 7, I store documents on Documents folder of Windows, Music and Videos on C:\Media folder, some programs are installed on C, some on other partition. Will Avast emergency update cause? if it’s true, why black screen doesn’t happen on the second Win 7?

17

Try: Avast GUI → Settings → Troubleshooting → Load Avast services only after loading other system services

18

Loading Avast after other services doesn’t help, at least at firts 3 boots after I change the settings.
Can I get your personal support, teamviewer or mail or something?

19

Update to the latest version (17.6.2310): https://forum.avast.com/index.php?topic=208020.0

20

I have installed the new version, but it seems slower than the beta.
The black screen still happens about 50% of boots.
I have checked that exclusion contains all thing you say, load avast service after system services.
I also set the for program update “Ask when an update is available”
Do you have any suggestion?