Windows & Other OS

What is BSoD and how to fix it

BSoD also known as the blue screen of death usually appears when our operating system, in this case Windows, you experience a system error from which you cannot recover.

BSoD occurs more often on operating systems such as Windows 95, 98 and Me and it has to do directly with device drivers that conflict with the operating system. The first time the blue screen of death appeared was in Windows 1.0 and was created by Steve Ballmer when he held the position in Microsoft’s operating systems division.

BSoD or Blue Screen of Death
BSoD or Blue Screen of Death

There are 2 types of BSoD (Blue Screen of Death)

There are two types of blue screens of death in Windows, the first has to do with a «Stop Error»Which causes the operating system to stop and can be fixed with a reboot.

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The second Blue screen of death is much more serious, it happens when the operating system cannot recover from a critical error. In this case, the only solution is to perform a new installation of the operating system, which could lead to the loss of all the information stored on the hard disk managed by the Windows file system. NTFS or FAT 16/32.

Common errors in BSoD or blue screen of death

  • IRQL NOT LESS OR EQUAL: Incompatible or not working drivers
  • UNKNOWN HARD ERROR or STOP c0000221: Corrupted or deleted registry files, faulty RAM
  • STATUS SYSTEM PROCESS TERMINATED: Incompatible software or drivers
  • KMODE EXCEPTION NOT HANDLED: Incompatible or poorly designed drivers, severely buggy software, faulty hardware
  • NTFS FILE SYSTEM, FAT FILE SYSTEM or NTFS FILE SYSTEM: Damaged hard drive, bad drive cables, corrupted file system
  • PAGE FAULT IN NONPAGED AREA: Incompatible drivers, incompatible software, defective RAM or motherboard
  • SYSTEM THREAD EXCEPTION NOT HANDLED: Incompatible drivers or software, faulty BIOS, incompatible hardware
  • KERNEL MODE EXCEPTION NOT HANDLED: Incompatible hardware, drivers or BIOS. The most common is that it is faulty RAM
  • BAD POOL HEADER: Bad software, hardware or RAM
  • STOP c000021a: Error in csrss.exe or winlogon.exe
  • BAD CONFIG SYSTEM INFO: Registration failures
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How to fix the blue screen of death

Before you think about reinstalling your OS, we recommend that you carry out the following checks:

  • Disconnect peripherals and check hardware
  • Disable overclocking of your device, this could be a cause of BSoD.
  • Check your computer for viruses or software that is causing conflicts.
  • Uninstall the last software installed before the accident happened.
  • In some cases the BSoD is usually solved when we look for updates, however, in other cases the same updates have conflicts. Therefore, uninstall or install the pre-BSoD updates.
  • Update the drivers.
  • Start in Safe Mode to detect the problem. From this mode you will be able to access your Windows settings so that you can undo any changes before BSoD.
  • Perform a system restore created days before. It is worth mentioning that this procedure will restore all the files saved until that day, so the new files will not appear.
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If this doesn’t work for you, then unfortunately you will have to perform a fresh installation of the operating system. What we always recommend is to periodically back up the information to an external storage unit, in this way you will keep your files safe.

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