BSOD 0x0007A kernel_inpage_err, 0x00F4 and operating system not found

Hi Ppl.
I just love this forum. I just joined here eventually and I am happy to see that I have at last landed at a place where I am sure to get some solid help. I am having a Sony Vaio E series VPCEE23FX Amd core 64 bit laptop which came with a pre-installed Windows 7 Home Premium 64 bit. I bought this laptop about 10 months ago from a deal in circuitcity.com.

Till about 2 months ago, everything was smooth. But now that's all changed. I get BSODs of the types 0x0007A with the title of "kernel_inpage_error" and also of the type "0x000F4". These are the only 2 types of bsods that keep occurring. Also many times, when I try restarting the lap or maybe powering it up, I get a black screen saying "operating system not found". But when I power off and power on and follow this process a couple of time, I am able to boot up.

The blue screen errors has been occurring for atleast one and a half months now with a frequency of almost 2 to 3 times "EVERY DAY"...Its been very very agonising to say the least.

First of all let me tell you what are things I have done so far.
1) I have already activated "small dump file" in the advanced settings. Also the paging file is also I believe of the right size. My system RAM is 3740MB and the size of the paging file is 3834MB which I believe would be sufficient to be abe to write a small dump file. Also, I have disabled auto-restart upon system failure and hence the blue screen just stays whenever it occurs, thus making it convenient for me to note down the error.

Till date I have not been able to locate the minidump folder which loads of ppl have been talking abt since time immemorial. This leads me to conclude that there is no dump file that is created everytime I get the BSOD. Not sure what exactly the problem is.

2) These apart, I pressed the in-built "assist" button and recovered my system to its factory settings. Still the BSODs come and "operating system not found" error creeps up.

3) There is no virus in my system. I have done complete system scans about twenty times already. Also done MBR scan, and cleaned registries using reginout and ccleaner. I keep my system cool with the help of a cooling pad and also a small table fan clipped to my study table all the time. Some of these things might seem like too much of an overkill but I have done just about everything to troubleshoot my BSODS but failed miserably in achieving any success in it. I can't believe that this might be the case of a heating issue because my core temperature hovers around 48 to 59 degrees most of the time. Also I fail to believe that this might be the case of a dying hard disk because the hard disk is just 10 months old.

4) I contacted vaio care through chat and through the phone. But they don't seem to have a good answer for the bsods. And I do not want to replace my hard-disk unless I am sure that the problem is with the hard-disk.

5) I ran chkdisk and there are no bad sectors on the hard disk.

There has been absolutely nothing I could do for as long as these two months to control these BSODs or in my quest to activate the minidump file.

I know there might be a solution to the latter. But guys pls help me. Atleast I want to get a dump file atleast once during a BSOD and upload, share and show u guys my miseries till date.

UPDATE: This is the first time I am getting a new kind of BSOD. Got it just now. And this says "C00000021a" {fatal system error} The windows subsystem process terminated unexpectedly with a status of 0XC0000006 (0X7743409b 0X00a3e940)

Not sure why.

Hi Mvdb,
Thanks a lot for replying. I guess your reply to this thread coincided with the occurrence of another BSOD in my laptop with the title C00000021a, fatal system error.

Do you have any idea about this BSOD?

And by the way, I will go through the links that you gave first. A couple of these things I have done already. But I will see to it first that no stone is unturned from my side. Thanks anyways.

I will post the results once done. But in the meantime,if you can throw some light on the fatal system error mentioned above, that will be of great help. thanks.

I think this error is slightly different from the one mentioned in the link that you have given. My error code by the way is C00000021a and not 0X00000021a. Also the scenario under which the bsod occurs as mentioned in that article doesn't seem to exactly tally with mine. Also the hotfix solution that is proposed in that article mentions the user to apply the hotfix only if the exact same scenario occurs, else just to wait for the next windows update.

So I guess it might not be helping in solving this exact bsod's cause.

@MvdB,
I have enclosed my replies after the questions in bold so that it is more easily readable.

MvdB said:

Hello Srinpraveen, welcome to SF! I hope we can help...

There are a couple of things we can try:

1. You really need those dumpfiles posted... Have you tried:
Dump Files - Configure Windows to Create on BSOD

Yes I forgot to mention this in the previous reply. But yes. I have tried activating the dump files in the exact method as mentioned in this link. Also I have tried Option 2 as well mentioned in the thread by downloading the reg file corresponding to small minidump and added it to the registry. But still no dumps are written. I don't see the C:\Windows\Minidump or C:\Windows\system32\Minidump. I don't see the folder anywhere for that matter. Something tells me that during these crashes, there is something that is preventing the computer from writing the dump file followed by the crash. The paging file size is also reasonably good as I had mentioned earlier.

2. Try running in Safemode w/networking on for a long time (24-48 hours). A bummer, I know... but lets see if we can separate HW from driver issues...

This I have to see. I will report this back after trying this and observing for 2 to 3 days.

3. Have you tried SFC /SCANNOW Command - System File Checker ?

Ya I did this a couple of hours back and have posted the screenshots. No system violations have been found and system scan returns clean results as can be seen in the screenshot.

4. You need to do more HDD testing just in case from what I understand in this story:
Use seagate tools or something like it to verify

I just downloaded the seagate's free "Sea tools for Windows" application. There were about a bunch of 5 hdd checks. And my hard disk has passed all the checks.

5. Try a clean boot: How to troubleshoot a problem by performing a clean boot in Windows Vista or in Windows 7

This link I am yet to read and check out.

And please post back the results?

So that I is my progress so far.

Okay I will increase the size of the paging file.

Regarding temperature difference between full operationa and idle operation, when the laptop is idle it has a more or less steady temperature of 52 to 55 degree celcius (around 130 degree farenheit).

When the laptop is fully loaded with different applications running concurrently such a virus scan running, a video playing from vlc player, a pdf opened, mozilla running, a vmware virtual machine running etc, then the temperature goes to as high as 69 to 71 degree celcius. (around 160 degree farenheit)

So does this point to anything or is it normal?