Author Topic: Unexplained Explorer.EXE crashes...  (Read 6316 times)

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Offline Alex Farlie

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Unexplained Explorer.EXE crashes...
« on: September 10, 2016, 01:44:55 AM »
Was getting some very unstable behaviour out of explorer. (So first step was disabling known shell extensions, as these are a KNOWN concern)

However this didn't resolve the issue , so I dug a little deeper, The Nirsoft Crashreporter found the concerns attached.

If Avast is working properly there ideally shouldn't be any bug-checks, internal exceptions NOR should Explorer.exe be falling over on XP.  (I'm still strongly suspecting a shell-extension/plugin is not doing quite what it's expected to, but lack the advanced debugging tools to dig any further.)

OS: XP SP3  Avast: : 12.3.2280 buld 122.3.2154.2

Offline Alex Farlie

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Re: Unexplained Explorer.EXE crashes...
« Reply #1 on: September 10, 2016, 01:08:25 PM »
More bug checks this morning. This was after removing Java 8, and DISABLING many other unknown shell extensions.

This means that whatever is causing a failure in Explorer is highly likely to be some interaction between Windows Explorer, Avast and Comodo Internet Security. (All of which are as far as I know at current builds.)

As I'm reaching the limit of the tools I have available to diagnose what's causing the crashes, I would appreciate a definite confirmation that people here are NOT aware of any known issues between Avast and Comodo.






Offline Asyn

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Re: Unexplained Explorer.EXE crashes...
« Reply #2 on: September 10, 2016, 03:32:13 PM »
...I would appreciate a definite confirmation that people here are NOT aware of any known issues between Avast and Comodo.
No problems here.
W8.1 [x64] - Avast Free AV 23.3.8047.BC [UI.757] - Firefox ESR 102.9 [NS/uBO/PB] - Thunderbird 102.9.1
Avast-Tools: Secure Browser 109.0 - Cleanup 23.1 - SecureLine 5.18 - DriverUpdater 23.1 - CCleaner 6.01
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Offline Alex Farlie

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Re: Unexplained Explorer.EXE crashes...
« Reply #3 on: September 10, 2016, 04:04:49 PM »
...I would appreciate a definite confirmation that people here are NOT aware of any known issues between Avast and Comodo.
No problems here.

Thanks, this means it's an unknown interaction (not confirmed as Avast.).

Is there a tool for disabling shell extensions / BHO's selectively?



Offline Asyn

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Re: Unexplained Explorer.EXE crashes...
« Reply #4 on: September 10, 2016, 04:31:39 PM »
- Which Avast..? (Free/Pro/IS/Premier)
- Other security related software installed..?
- Which AV(s) did you use before Avast..?
W8.1 [x64] - Avast Free AV 23.3.8047.BC [UI.757] - Firefox ESR 102.9 [NS/uBO/PB] - Thunderbird 102.9.1
Avast-Tools: Secure Browser 109.0 - Cleanup 23.1 - SecureLine 5.18 - DriverUpdater 23.1 - CCleaner 6.01
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Offline Alex Farlie

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Re: Unexplained Explorer.EXE crashes...
« Reply #5 on: September 10, 2016, 06:04:39 PM »
- Which Avast..? (Free/Pro/IS/Premier)
- Other security related software installed..?
- Which AV(s) did you use before Avast..?

Avast Free -( Build as given in the previous postings)

I also use Comodo Internet Security() and Spybot Search and Destroy

Before Avast I was using AVG, but that was as I understood that had been completely uninstalled.

Other (Non Microsoft ) shell extensions I found were:-

Java
Acrobat Reader
7 Zip
Win Rar
Notepad++
Libre Office.

But these were disabled in case of an incompatibility.












Offline Asyn

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Re: Unexplained Explorer.EXE crashes...
« Reply #6 on: September 10, 2016, 06:11:23 PM »
First, be sure to get rid of Spybot..!!

Then:
1. Download Avast Free Antivirus: https://files.avast.com/iavs9x/avast_free_antivirus_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.
W8.1 [x64] - Avast Free AV 23.3.8047.BC [UI.757] - Firefox ESR 102.9 [NS/uBO/PB] - Thunderbird 102.9.1
Avast-Tools: Secure Browser 109.0 - Cleanup 23.1 - SecureLine 5.18 - DriverUpdater 23.1 - CCleaner 6.01
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Offline bob3160

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Re: Unexplained Explorer.EXE crashes...
« Reply #7 on: September 10, 2016, 07:38:23 PM »
Comodo Internet Security is a resident AV and also shouldn't be there.Never use more than one resident AV at a time.
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Offline Alex Farlie

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Re: Unexplained Explorer.EXE crashes...
« Reply #8 on: September 10, 2016, 07:52:03 PM »
Comodo Internet Security is a resident AV and also shouldn't be there.Never use more than one resident AV at a time.

It's not an AV, It's a firewall. If Avast can't recognise the difference then that's unfortunate.

Offline bob3160

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Re: Unexplained Explorer.EXE crashes...
« Reply #9 on: September 10, 2016, 07:55:01 PM »
Comodo Internet Security is a resident AV and also shouldn't be there.Never use more than one resident AV at a time.

It's not an AV, It's a firewall. If Avast can't recognise the difference then that's unfortunate.
Free Security Seminar: https://bit.ly/bobg2023  -  Important: http://www.organdonor.gov/ -- My Web Site: http://bob3160.strikingly.com/ - Win 11 Pro v24H2 64bit, 32 Gig Ram, 1TB SSD, Avast Free 24.4.6112, How to Successfully Install Avast http://goo.gl/VLXdeRepair & Clean Install https://goo.gl/t7aJGq -- My Online Activity https://bit.ly/BobGInternet

Offline Alex Farlie

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Re: Unexplained Explorer.EXE crashes...
« Reply #10 on: September 10, 2016, 07:58:54 PM »
Comodo Internet Security is a resident AV and also shouldn't be there.Never use more than one resident AV at a time.

It's not an AV, It's a firewall. If Avast can't recognise the difference then that's unfortunate.



Well I checked and what I seem to have is Comodo Firewall, not "Internet Security", so it doesn't have AV capability as such. However it DOES have something called Defense+/HIPS
which may be the cause of the interaction.




Offline Asyn

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Re: Unexplained Explorer.EXE crashes...
« Reply #11 on: September 10, 2016, 08:07:32 PM »
Comodo HIPS shouldn't be a problem, follow my advice (Reply #6).
W8.1 [x64] - Avast Free AV 23.3.8047.BC [UI.757] - Firefox ESR 102.9 [NS/uBO/PB] - Thunderbird 102.9.1
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Offline Alex Farlie

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Re: Unexplained Explorer.EXE crashes...
« Reply #12 on: September 10, 2016, 09:25:59 PM »
Comodo HIPS shouldn't be a problem, follow my advice (Reply #6).

Did so.  Seems to have reinstalled cleanly enough..  Is there an option in the paid version to scan for "bad shell extensions/ BHO" specifcally.

I know it's probably beyond an anti virus program, but do you know of any tools that can take a random EXE and do some form of static/huerstical analysis?  I am very strongly thinking it's a "Non Avast" shell extension/BHO that caused the headaches..

Offline Alex Farlie

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Re: Unexplained Explorer.EXE crashes...
« Reply #13 on: September 10, 2016, 09:39:20 PM »
Comodo HIPS shouldn't be a problem, follow my advice (Reply #6).

Hmm,  but Cavshell.dll might be , It described itself as "..Anti Virus" when I ran a shell extension checker. (Disabled temporarily as precautionry measure. - Will be running a FULL Scan shortly.

RESOLVED - In respect of Avast involvment, so I'll be directing further comments in the directions of other vendors....

Thank you for your patience. 

Feature Suggestions for the Paid/Pro version,
*A scan on "crash"-tool that can advise what went wrong in an app that crashed (such as explorer.exe), and possibly scan the modules mentioned in a stack trace for odd signatures. (I find the normal "X has encountered a problem" dialog a little misleading sometimes.






Offline Asyn

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Re: Unexplained Explorer.EXE crashes...
« Reply #14 on: September 11, 2016, 08:07:01 AM »
You're welcome.
W8.1 [x64] - Avast Free AV 23.3.8047.BC [UI.757] - Firefox ESR 102.9 [NS/uBO/PB] - Thunderbird 102.9.1
Avast-Tools: Secure Browser 109.0 - Cleanup 23.1 - SecureLine 5.18 - DriverUpdater 23.1 - CCleaner 6.01
Avast Wissenswertes (Downloads, Anleitungen & Infos): https://forum.avast.com/index.php?topic=60523.0