BSOD Win7 - first 7A, now F4

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Hi everyone.

I have one HP ProBook 450 G0 - H0V97EA just over one year old (so the warranty is no good). Until the day before tomorrow I had no problems with it whatsoever, until after waking up from the sleep state it gave me a BSOD with 7A error. That happened 1-2 more times in a row, even when I tried to get it up in safe mode. After that, I did a System Restore for about 20 days in the past and it worked normally after that for the whole day until the evening when the same thing happened. There were a few applications opened but nothing hard on the processor, suddenly it froze, the monitor went black and then got the BSOD 7A.

Yesterday I decided to do a Win7 reinstall, and it's an original Win7 Professional SP1. Had some problems with the drivers but nothing much, after the drivers I put on Defraggler who said that HDD state was good. The laptop worked with no problems and last night I didn't put it to sleep but shut it down. This morning, I gave it a couple of minutes to turn on (I wasn't standing next to it so didn't see what phase was he in) but the desktop must've just opened because when I tried to open FireFox, it froze up again and gave me a BSOD F4. My crash dump settings were set to kernel so it's a 300MB file and my uploading speed is very, very slow - if it's apsolutely necessary I'll try to upload it, but I now changed the settings to minidump and I'll upload it here if it occurs again.

CrystalDiskInfo describes the state of HDD as Caution despite what Defraggler says. I don't know if this is already a sign of something, I'm attaching a screenshot.



I did a Chkdsk last night after reinstalling the windows. I also ran Windows Memory Diagnostic Tool this morning after the crash and it said that it didn't find anything wrong.

Has anybody got an advice on how to move forward?

Thanks in advance!

EDIT: it would appear it did make a minidump afterall. I'm attaching it as well.

 

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It just happened again but this time a 7A. Dump attached (072515-21403-01), this is a message I got from Windows:

Problem signature:
Problem Event Name: BlueScreen
OS Version: 6.1.7601.2.1.0.256.49
Locale ID: 1050

Additional information about the problem:
BCCode: 7a
BCP1: FFFFF6FC40009770
BCP2: FFFFFFFFC0000185
BCP3: 000000009D6C8860
BCP4: FFFFF880012EED18
OS Version: 6_1_7601
Service Pack: 1_0
Product: 256_1

Situation update: It was on electric power, I put in the battery (has lots of juice), take out the power supply - it got all messed up, the only thing left on the screen was the desktop background (even no taskbar), it resets (but without the blue screen). Turns on again, appears to be working, the battery is inside, I try to put in and then take out the direct power supply, it appears to be all ok. I leave the power supply in it and try to take the battery out - another BSOD, this time an F4. Windows log:

Problem signature:
Problem Event Name: BlueScreen
OS Version: 6.1.7601.2.1.0.256.49
Locale ID: 1050

Additional information about the problem:
BCCode: f4
BCP1: 0000000000000003
BCP2: FFFFFA80067CAB30
BCP3: FFFFFA80067CAE10
BCP4: FFFFF80002D85940
OS Version: 6_1_7601
Service Pack: 1_0
Product: 256_1

Dump attached (072515-19156-01).

Now it's on without the battery.

I also downloaded SeaTools and did some tests, here are some results:

Model Number: HGST HTS541075A9E680
Firmware Revision: JA2OA590
Fix All Fast - Started 25.7.2015. 14:09:51
Fix All Fast - FAIL 25.7.2015. 14:10:02
SeaTools Test Code: 6C9AC2A4
SMART - Started 25.7.2015. 14:10:11
SMART - Pass 25.7.2015. 14:10:16
Short DST - Started 25.7.2015. 14:10:25
Short DST - FAIL 25.7.2015. 14:10:42
SeaTools Test Code: 6C9AC2A4
Identify - Started 25.7.2015. 14:11:29
Short Generic - Started 25.7.2015. 14:11:38
Short Generic - Pass 25.7.2015. 14:13:12
Short DST - Started 25.7.2015. 14:21:18
Short DST - FAIL 25.7.2015. 14:21:35
SeaTools Test Code: 6C9AC2A4
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Also: