Windows 10 - randomly appearing BSoDs

[IT_WinSec]

With regards to the AVG leftovers, what you have from them are just leftovers, not active parts. You can get rid of them in a very simple way.

Run Autoruns and wait for the scan to finish

Inspect the rows (lines) and once you see the AVG entries, right click on them and choose Delete

They are located under Task Scheduler and under Services

Eventually, close Autoruns and you are fine with regards to that.

[Paolo18]

Dear @IT_WinSec,

First of all, thanks for your help. I followed your instructions and you may find the outcomes in the usual folder:

https://drive.google.com/open?id=1k7ckmc_9ogz0nhpBw6fkWUU5g8ewy2gB

In particular, for the F2 test something strange happened: I run it, it foresaw 1h 22' and something like 15'' of time before finishing, then after something like 10 secs (sec more, sec less) it stopped with the following message

Processor Check : PASSED

Memory Extensive Check : FAILED

FAILURE ID : RQ91XR-8M8A1X-XD7X6K-40NL03

PRODUCT ID : W4N09EA#ABZ

Memory Module 2 : Bottom - Slot 2 (right)

---------------------------------------------------------------------------------

Component Test : FAILED

and the failure ID is slightly different from yesterday's one (you may find a picture of the screen in the folder).

Secondly, I sincerely beg your pardon for my skepticism (I didn't find a better word in English, I'm sorry) but:

1. How does this kind of "damage" happen and why so suddenly? 
   The laptop was working perfectly and it was well cared up until the 2nd of February and then, from night to morning, a memory slot is damaged and it starts to run into BSoDs. Is this possible? And how?
2. Why did the system not find it on the first run, a couple of weeks ago?
3. Why, after removing Kaspersky and reinstalling Firefox and Chrome, no new BSoD appeared? If it is a memory fault, shouldn't them continue to show up from time to time?
4. Does this memory failure explain also the other symptoms such as the thousands of errors and warnings in the Event Log?

You already helped me a lot with this issue. I am sincerely grateful to you for your time and your effort, but this laptop is my main working tool and I need to be able to rely on it and to have it "healthy".

Again, many thanks in advance and all the best,

Paolo

[IT_WinSec · Accepted solution]

Based on the latest test, I can conclude the problem is with the memory.

Fix:

Basically, you need to open your computer, get the faulty module out and buy a new one of the same type, and install the new memory chip.

Currently you should have 4 GB DDR3 RAM, your new one must be the same:

• DDR3 1600 - PC3L
• 4 GB or 8 GB (1x4 GB, 1x8 GB or 2x4 GB)
• same type/speed/frequency PC3L 12800, 800-MHz
  
• your current memory is from Samsung, new one may or may not be Samsung

Information on the memory

>> https://www.computerhope.com/btips/memory.htm

>> https://en.wikipedia.org/wiki/DDR3_SDRAM

Your PC has 2 slots for memory chips.

• Your PC may currently have only 1 memory chip located on slot 2, or
• you may have 2 memory chips (but only 1 of them is very corrupted - the one located on slot 2),

-> If you have 1 memory chip, you need to replace it completely

-> If you have 2 memory chips, you need to replace the one on slot 2.

You can only be 100% sure by opening the device

** You can buy the memory from a reputable local tech store, order it online or check the HP Parts Store >> http://partsurfer.hp.com/

Here is an article >> https://support.hp.com/nz-en/document/c00820047

** HOW TO OPEN THE PC

-> Do it on your own

or -> Send it to a local tech service center you trust

How to do it on your own can be seen in this video
https://www.youtube.com/watch?v=pv0kfHZ9-08

Here is the official service manual for your PC model (you may also read it - page 56/64 ) >> http://h10032.www1.hp.com/ctg/Manual/c06189775

You may also contact HP but since your device is out of warranty, a service fee may be applied
>> https://www8.hp.com/be/nl/contact-hp/phone-assist.html

or >> https://www8.hp.com/be/fr/contact-hp/phone-assist.html

Once you replace the memory chip, the issue should be resolved. Let me know if this helps.

[IT_WinSec]

My comments are in red below

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@Paolo18 wrote:

Secondly, I sincerely beg your pardon for my skepticism (I didn't find a better word in English, I'm sorry) but:

1. How does this kind of "damage" happen and why so suddenly? 
   The laptop was working perfectly and it was well cared up until the 2nd of February and then, from night to morning, a memory slot is damaged and it starts to run into BSoDs. Is this possible? And how?

>> It is possible. Bad things happen fast. Parts with no moving parts like SSD or memory usually begin to show symptoms of problem in a very prompt manner.
Why it happened - well, for the same reason cars break, humans die, parts wear out...

1. Why did the system not find it on the first run, a couple of weeks ago?

>> It may sound not professional but I cannot say why.

1. Why, after removing Kaspersky and reinstalling Firefox and Chrome, no new BSoD appeared? If it is a memory fault, shouldn't them continue to show up from time to time?

>> Yes, BSODs should continue to re-appear (continue to happen) since the memory is faulty. Once the faulty part is removed, BSODs should stop.

From what I understood from the previous comments, BSODs did continue to happen after Kaspersky was uninstalled.
On a comment posted on 25-02-2020 12:35 PM - edited ‎25-02-2020 01:35 PM you mentioned Kaspersky was uninstalled... Subsequent comment posted on 26-02-2020 08:50 AM confirms new BSOD has appeared (Kaspersky should have been gone here)

1. Does this memory failure explain also the other symptoms such as the thousands of errors and warnings in the Event Log?
   
   >> I cannot be 100% sure because I haven't see them but most likely yes. Faulty memory is a big issue. BSOD is also a big issue. But do not bother reading the Event Viewer - it is usually full of errors, warnings or info messages even if your hardware is OK

You already helped me a lot with this issue. I am sincerely grateful to you for your time and your effort, but this laptop is my main working tool and I need to be able to rely on it and to have it "healthy".

Again, many thanks in advance and all the best,

Paolo

>> You are most welcome, Paolo.  Let me know if you have other questions and if you managed to replace the memory

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