Hello, greetings to all. I have some problems with BSOD. About one month, month and a half my PC started freezing and BSOD errors were shown to me. The problem was i couldn't do anything on the PC, 'cos it crashed sometimes even when playing Spider Solitaire. The freezes and BSOD were random, and the codes of the BSOD were: 0x000000A 0x0000001E Actually, first after few crashes i went to Event Viewer and I found only one error constantly shown: Source: atapi Event ID: 11 General: The driver detected a controller error on \Device\Ide\IdePort3. And I thought this was my problem. After some research for this error, I got my hands on some information that it stands for HDD error. So I downloaded Western Digital application for testing HDD fault and bad sectors and it showed nothing. After some more research I came across that Comodo Internet Security is making those crashes. C After uninstalling everything was great, except I felt sorry for uninstalling CIS, 'cos i was pleased with the security it offered. Reinstalling CIS didn't fix the problem, and the program couldn't even update, don't know why. So naturally, I installed software that wouldn't "interfere" with Windows - Windows Essentials. For a week, all was going perfectly, and then, another BSOD, and computer started freezing all over again and showing BSOD, except now it were different codes: 0x0000003B 0x0000001A I thought it was a virus and tried to update Windows Essentials, the program is working fine, but it was showing me connection error, that didn't existed. I started researching and came up with information that this code is for faulty RAM, so I downloaded Memtest86 v.4.0. and after 8 and a half hours, it showed 8 passes, and zero errors, so I assumed that my RAM is OK. So I tried testing my theory with virus, worm or trojan, and got my self Kaspersky Rescue CD, BitDefender Rescue CD and Norton Bootable Recovery Tool, and run them all, twice! I started with Kaspersky RCD, and the first time I found some trojans and viruses, deleted them, and all scans after say that the PC is clean. Then booted into windows and used Spybot S&D and Malwarebytes, again PC is clean. And then I started researching again and I got some information that Windows Essentials is causing BSODs, so I uninstalled it and installed Avast Free Version, and it's working fine, but freezes and crashes don't stop. Interesting thing I noticed is that freezes start with more than 2150-2300MB RAM Usage, and if sidebar isn't freezed sometimes, it show's 0-10% CPU Usage and RAM doesn't go higher than 3100MB. I don't have anymore ideas about fixing this problem. It couldn't be caused by overheating 'cos I removed the metal covers of the PC housing when initial BSOD crashes started and when it freezes I check temperature and it isn't very warm, normal temperature. After analyzing dumps myself, I found some outdated drivers, so I updated them. Found some info that ASACPI.sys is major BSOD cause, but now its updated and time stamped to 2009. After this update, the PC was working perfectly for about few hours, and then freezes and BSOD's started again, but now BSOD codes are: 0x00000077 0x0000003B This codes are referred to as KERNEL_DATA_INPAGE_ERROR. When I analyzed the new dumps with Blue screen of death (STOP error) information in dump files. I found that cause to the problem is ntoskrnl.exe and I'm trying to find some patch or fix for this file, but nothing so far. I had Daemon Tools Lite, and I found info that stated that this program is major BSOD cause, so I uninstalled it and used DuplexSecure tool to remove SPTD file. Freezes and BSOD are not stopping. System spec's are: Motherboard: ASUS P5Q CPU: Intel Core 2 Duo E7300 2666Mhz VGA: nVidia GeForce 9600 GT + 1024MB RAM: 2x Kingston DDR2 2048MB Chipset: Intel Eaglelake P45 HDD: Western Digital WD5000AACS 500GB OS: Windows 7 Ultimate x64 Thanks in advance. Sorry for my bad English, its not my native language. Looking forward for your answers and hearing from you soon.