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Author Topic: The Generic Computer Advice Thread  (Read 572553 times)

coalboat

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Re: The Generic Computer Advice Thread
« Reply #4545 on: May 09, 2021, 10:05:13 am »
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coalboat

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Re: The Generic Computer Advice Thread
« Reply #4546 on: May 09, 2021, 10:05:55 am »
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coalboat

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Re: The Generic Computer Advice Thread
« Reply #4547 on: May 09, 2021, 10:11:47 am »
Quote from: wierd on May 09, 2021, 09:35:19 am
Prior to that, your computer was having a very terrible time trying to resolve an IP v6 address.

I installed gnome at some point but uninstalled it later. As the log shows, gnome was still running. Could this be the problem? How can I remove gnome completely?

Quote from: gimlet on May 09, 2021, 09:48:14 am
The very basic things I always do first is to check the disk diagnostics, and run a memtest overnight.   Even run one of the drive tests if it's a mechanical drive.  Memory/disk problems can manifest as completely baffling symptoms and you can easily chase your tail for a long time with misleading symptoms.  Very simple things to do to provide a sound starting point to diagnose something trickier...

Is there a way to know how long it would take before doing the test?

edit: I held down shift while the computer was restarting but it didn't go into the GRUB.
« Last Edit: May 09, 2021, 10:23:50 am by coalboat »
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methylatedspirit

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Re: The Generic Computer Advice Thread
« Reply #4548 on: May 09, 2021, 10:48:26 am »
Quote from: coalboat on May 09, 2021, 10:11:47 am
Quote from: gimlet on May 09, 2021, 09:48:14 am
The very basic things I always do first is to check the disk diagnostics, and run a memtest overnight.   Even run one of the drive tests if it's a mechanical drive.  Memory/disk problems can manifest as completely baffling symptoms and you can easily chase your tail for a long time with misleading symptoms.  Very simple things to do to provide a sound starting point to diagnose something trickier...

Is there a way to know how long it would take before doing the test?

I don't think there is. It all depends on how much RAM you have as well as its speed. Something like MemTest86 will just display any errors that show up while it's testing, so even if it's not actually done when you wake up, you at least have some idea of how well it's doing.

The same principle should apply to hard disks, but I don't have any experience with testing those.
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coalboat

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Re: The Generic Computer Advice Thread
« Reply #4549 on: May 09, 2021, 11:39:24 am »
I've set:
GRUB_TIMEOUT_STYLE=menu
GRUB_TIMEOUT=5

But GRUB doesn't show up when I hold shift.
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lethosor

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Re: The Generic Computer Advice Thread
« Reply #4550 on: May 09, 2021, 03:26:26 pm »
Did you run "update-grub" afterwards?

Also, posting logs to a site like Pastebin is generally preferable to making multiple forum posts.
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wierd

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Re: The Generic Computer Advice Thread
« Reply #4551 on: May 09, 2021, 04:09:00 pm »
If this is a debian like--

sudo apt-get purge -f gnome3

That should purge gnome 3, and check for broken dependencies.

Also, as a diagnostic step, i would disable IPv6 in the network manager profile for you connections.

You also need to update your SSL certificates and verify your system time is correct.

The failed connection messages suggest a script desperate to get an NNTP reply from a google time server to sync the system clock, but being repeatedly refused.

Such refusals, hilariously, can come from ssl certs being considered invalid, for being "issued in the future". -- a thing NNTP is meant to fix!

Verify the system clock has the correct time after disconnecting the network cable and doing a cold start from power-off. if it is "very wrong", replace the CMOS battery.
« Last Edit: May 09, 2021, 04:16:26 pm by wierd »
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Lord Shonus

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Re: The Generic Computer Advice Thread
« Reply #4552 on: May 09, 2021, 05:29:24 pm »
A friend running Win10 has a major hijack of his Chrome browser. All the Chrome settings I know about look fine, the only extensions he has seem legit, and there are no strange processes. A malwarebytes scan shows nothing amiss.

Not only do searches from the address bar go to random search engines after a bling and you miss it pop-up, if you go to Google directly your search will be replaced with a different one after a second. Unless there is a Chrome equivalent of about:config I don't even know where to look next.
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On Giant In the Playground and Something Awful I am Gnoman.
Quote from: Spehss _ on April 29, 2015, 11:15:32 pm
Man, ninja'd by a potentially inebriated Lord Shonus. I was gonna say to burn it.

Starver

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Re: The Generic Computer Advice Thread
« Reply #4553 on: May 09, 2021, 05:55:35 pm »
Though I might expect malwarebytes to have a handle on this and alert you to anything it recognises, have a look in the Hosts file (c:\Windows\System32\Drivers\etc\hosts - probably?) and see if you have some entries like
Quote
666.666.666.666       www.google.com
(The 666s won't be that, of course, but numbers for a proper IP-ranges. Or possibly even IPv6-ranges, but I've never seen or done ::::: notation there, myself. And there'd probably a number of 'traps', of various supposedly-legitimate addresses, not just that single google.com one.)

If you have such things (that you don't recognise having been put there for known reasons), then that might be the little trick inserted into the system.

Just a guess, based on ruling out the few things you've already tested for. Might not be this either.
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methylatedspirit

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Re: The Generic Computer Advice Thread
« Reply #4554 on: May 09, 2021, 06:13:43 pm »
Forgive me if I'm being ignorant, but if the Hosts file is the problem, why not just delete that one and replace it with a fresh copy? Decontaminating it yourself seems like an error-prone process.
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Starver

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Re: The Generic Computer Advice Thread
« Reply #4555 on: May 09, 2021, 06:35:20 pm »
I was suggesting seeing if the hosts file was the problem, really.

If there's nothing in there (or if there's just hosts.sam - also lmhosts.sam) then look for something new. Don't just delete and possibly unfix something legitimately 'hosts'ed.

If there's odd things in there, then that is useful information. And should be trivially decontaminatable (at least at this step of the game[1]) because not that many people (who don't know exactly what they'd want to have in their .hosts file) will have more than a single legitimate entry or two (or a single series of like-minded redirects, or two serieses). Depending on what not-Malware-but-still-rather-Control-Freaky software they might have.

But, anyway, it's possible that you go looking in there (assuming you're already getting around the "don't show extensionless files" settings that Windows defaults to, and whatever other nonsense later-version Windowses might add under the aegis of User Access Control[2]) and it isn't that.  It's just what first came to mind.  Carry on carrying on!


[1] If it redirects traffic to localhost[:port], like I know some WebAV installs used to like to do at one time, to try to MITM-scan traffic, then it points at there being some self-proxying server malware that needs identifying. If it just points to some BigBadIP then that might be useful information to pass to... someone... possibly? Depends on how involved you want to go into this, trying to contact general ISP admins on addresses they actually bother to monitor, etc, etc...

[2] That might stop the user (or you as the fixer) from accessing the very files that the original malware payload had no difficulty messing around with.
« Last Edit: May 09, 2021, 06:38:37 pm by Starver »
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Lord Shonus

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Re: The Generic Computer Advice Thread
« Reply #4556 on: May 09, 2021, 07:09:36 pm »
Won't be able to check it until tomorrow, but the hosts file is a good suggestion.
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On Giant In the Playground and Something Awful I am Gnoman.
Quote from: Spehss _ on April 29, 2015, 11:15:32 pm
Man, ninja'd by a potentially inebriated Lord Shonus. I was gonna say to burn it.

wierd

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Re: The Generic Computer Advice Thread
« Reply #4557 on: May 09, 2021, 07:15:16 pm »
Have him try running HiJackTHIS!

https://github.com/dragokas/hijackthis/releases

It has a lot of functionality that malware bytes does not have in cleansing browser exploits from systems.
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nenjin

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Re: The Generic Computer Advice Thread
« Reply #4558 on: May 09, 2021, 09:25:03 pm »
Haven't used HiJackThis in quite a few years, but yeah it was my go-to after the first pass of big name commercial AV failed to fix problems.
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coalboat

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Re: The Generic Computer Advice Thread
« Reply #4559 on: May 10, 2021, 12:27:21 am »
Quote from: lethosor on May 09, 2021, 03:26:26 pm
Did you run "update-grub" afterwards?

Now I can see GRUB but there's no entry of memtest. Only "Ubuntu" and "Advanced Options for Ubuntu".

Quote from: wierd on May 09, 2021, 04:09:00 pm
sudo apt-get purge -f gnome3

I have done this and it returned an error:
Unable to locate package gnome3

The connection to google server failed because I'm in China where google is blocked.
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