Startup crash

Dear community,

as a programmer, previously I have solved all my computer problems by seeking through Google, but this problem got over me, so I'm hoping a little guidance or help from you.

The general problem is really wide, my PC freezes on random startups. However...
In average, out of 3 starts, there are two crashes, and in the other time there are no problems at all.
The time of the crash is also really random. Sometimes the Windows logo crashes, sometimes login screen, and sometimes <5 minutes after login. After some minutes pass, there are no crashes for sure.
There is no BSOD, no error messages, or anything. The screen freezes, and nothing will ever work, until I hard restart.
The same happened with my previous Windiws 7 installation. That's why I thought it may be hardware problem, but after installing Win10, it was working perfectly for like a month or two... then it started again (maybe something driver?).
The Windows startup fixing tool couldn't fix the problem, however, once it was crashing too! So there is no way any desktop-application is causing it.
memtest: false (haven't done a full-day deep test)
chkdsk: false (haven't done a full-day deep test)

System specification:
Motherboard: ASRock Z77 Pro4
CPU: Intel Core i5
Memory: 8GB
My system is on a 64GB SSD (OCZ-Vertex4), and I also have a 700GB WD HDD

I have attached both boot log and event log export (I have renamed the event log from *.evtx to *.log, because the forum does not allow that type of file, but you can open it easily after renaming it back).

ntbtlog.txt
Attachment 53869

Any idea may be helpful, because it starts to be really annoying, and I just can't find a solution for it.

Thanks,
Kristóf

Hello and welcome to the tenforums!

I have seen a number of posts where people have been getting random crashes for no apparent reason and many have associated this with the nVidia graphics driver and associated software. My first thought is that this is what you are seeing.

Have a search for some of the posts related to NVidia but for starters you could try this one:

Windows 10 Recurring Crash/Freeze - nVidia?

Thanks your fast reply. Firstly, I have enabled nVidia driver service by following @philc43's link, if that's not gonna work, I may try do a clean driver install as suggested.
@dalchina, I have looked, but since I have no really idea what do those errors mean (and haven't found much useful for them on Google), I have attached to the post, so maybe it will be obvious for an expert :)
And yes, I have tried safe mode too.
I have upgraded, but did a full install, so it haven't kept any files. And as I mentined (maybe not clear enough), in the first 1-2 months after the install, I didn't have any problem, it just started randomly. The same happened for the previous Win7 installation: No problems after install, only after some months passed. No idea what could have happened, I installed Realtek drivers in the meantime, but it may have no relation at all.
Also sadly I haven't any restore points, it's happening for months for now.
Thanks for the idea by the way, I'll now try WhoCrashed, didn't know it exists :)

UPDATE
According to WhoCrashed: "Crash dumps are enabled but no valid crash dumps have been found.", so probably it won't help much.

dalchina said:

Have a look at the SMART parameters for your hard disk, and try a RAM test.

S.M.A.R.T. is ok, and I have just run another full memtest, no errors. Anything else I should check?

Thank you.

I had almost the same problem for several weeks. It freezes a few minutes after a cold boot. What worked for me to disable the "turn on fast startup" in the Power options

awatz said:

I had almost the same problem for several weeks. It freezes a few minutes after a cold boot. What worked for me to disable the "turn on fast startup" in the Power options

Thanks your suggestion, but I have already tried that, and the same thing happened :/

iCore said:

...There is no BSOD, no error messages, or anything. The screen freezes, and nothing will ever work, until I hard restart...

I had the same symptoms the other day when i went from AC power to battery power.

Previously, with another earlier build, i did get BSOD when i went to battery power. However, not this time - everything just froze, i couldn't even see my mouse pointer (not that it would have helped, the system was completely frozen, couldn't do anything except do a hard power down)

Before using DDU and reinstalling earlier nVidia graphics driver in Safe Mode, i decided to rollback driver via Device Manager. Funny thing was that after i did this, instead of it being an earlier version of the driver, it was a NEWER driver. Windows had automatically installed it. There was no Windows Update for this driver, it just installed after restarting my computer after a build update. Also, what was weird was that using the latest version of the driver (at the time, several months ago) caused the BSODs i experienced - i had to use DDU to totally uninstall drivers and reinstall an earlier version put out by Acer (my laptop manufacturer) specifically for Windows 10, all within Safe Mode.

So...i would start with graphics driver.


P.S. After googling issue, one solution which worked for a few people was to make sure under Power Options that both AC/DC options are the same.

Bon chance!

Thanks @AthanasianCreed, I'll try doing something with the nVidia driver (by the way I have a PC, so battery-power does not matter here) :)