Bsod at startup - driver or Bios or Win7 reinstall?

Hello,

Please somebody help me to solve my BSOD.

I have it for a few months. I upgraded from Win XP to 7, changed the antivirus system to Comodo CIS from Avast, updated drivers and did other things (check disk, win update etc.). After changing 1 module of RAM 512 MB, some crashes disappeared, only bsod at boot time remained. I deleted existing settings at Driver Verifier, and after that (I suppose that was the reason) the crashes disappeared. I didn't have BSOD for 2/3 weeks.

Now I have them again in the last week. The bluescreen view showed almost always different messages (this week): pfn list corrupt, memory management, driver irql not less or equal, apc index mismatch. Earlier: memory management, driver veriver dma violation, special pool, bad pool header. The address of the crash is ntoskrnl.exe.

It would be good to know, that is it a driver failure (if so, which one), or BIOS update (but I couldn't find a proper new one) or a Win7 reinstall? Or could it be the Comodo Internet Security?

Thank you very much for any answer

Gerrard

Is it possible that the problem is the paging file? By default it was handled by Win7 and the size was 1 GB (like the amount of RAM). I modified it manually between 1,5 and 3 GB. Any ideas?
Thanks

paging file can cause no problems because i have deleted mine and rebooted to see if there was any problems and there was none.Windows created a new paging file

BIOS has nothing to do with it,if anything was wrong with the BIOS,there will be no BSODs.That means Windows will not even start to show any BSOD.

Welcome to the W 7 forum.

I hope that we can help you with your problem.


It appears that the COMODO Firewall Pro Sandbox Driver is crashing your computer.
Please look for an update.



Let us know how you go.

Hope this help.

Also please check your RAM with Memtest86+. Memtest86+ Memory Testing

Hope this helps.

Hi Shintaro,

The Comodo IS is automatically updated, I don't know how to update the Sandbox driver manually. Maybe it would be easier to turn off or uninstall.
I hope that RAM is not the problem because I changed 1 module 2 months ago, and the other is just only 1,5 year old (both have the same serial number: Kingmax MPC ... etc.). But I will make memtest after the next Bsod.

Otherwise, as I mentioned earlier, I set higher the size of paging file and no crashes for 2 days. (?)

Are you able to remover the Sandbox part of Comodo and leave the firewall in place?

But if you can please test your RAM.

Hope this helps.

I can only remove the firewall part of Comodo (including the sandbox).
Last night I made memtest86 run and found no errors after 6 passes.
I think I will uninstall the firewall.
But what do you think of Driver Verifier? I deleted the default settings and after that less BSOD, about every third boot. (before: almost every startup crashed)

continued: maybe because of CIS Sandbox driver...