STOP error 0x0000007B errors are caused by device driver issues (especially those related to hard drive and other storage controllers), viruses, data corruption, and sometimes even hardware failures.
Did you just install or make a change to a hard drive controller? If so, there's a good chance that the change you made caused the STOP 0x0000007B error.
Undo the change and test for the 0x7B blue screen error.
Depending on what changes you made, some solutions might include:
Remove or reconfigure the newly installed hard drive controller.
Startup with Last Known Good Configuration to undo related registry and driver changes.
Use System Restore to undo recent changes.
Rollback hard drive controller device driver to version prior to your driver update.
Verify that the SCSI chain is correctly terminated, assuming you're using SCSI hard drives in your computer. Incorrect SCSI termination has been known to cause STOP 0x0000007B errors.
Note: Most home computers don't utilize SCSI hard drives.
Verify that the hard drive is properly installed. An improperly installed hard drive could cause STOP 0x0000007B errors and other issues.
Verify that the hard drive is configured properly in BIOS. The STOP 0x0000007B error could occur if the hard drive settings in BIOS are incorrect.
Scan your computer for viruses. Certain viruses that infect the master boot record (MBR) or boot sector can cause STOP 0x0000007B errors.
Important: Make sure your virus scanning software is updated and configured to scan the MBR and boot sector.
Update the drivers for your hard drive controller. If the drivers to your hard drive controller are outdated, incorrect, or corrupted then the STOP 0x0000007B error will likely occur.
Note: If the STOP 0x0000007B error occurs during the Windows setup process and you suspect that the reason is driver related, be sure to install the latest hard drive controller driver from the manufacturer for use during the installation of the operating system.
Note: This is a likely solution if the second hexadecimal number after the STOP code is 0xC0000034.
Change the SATA mode in BIOS to IDE mode. Disabling some of the advanced features of SATA drives in BIOS could stop the STOP 0x0000007B error from showing up, especially if you're seeing it in Windows XP or during a Windows XP installation.
Note: Depending on your BIOS make and version, SATA mode may be referred to as AHCI mode and IDE mode may be referred to as either Legacy, ATA, or Compatibility mode.
Note: While not a common solution, you may also want to try the reverse - see if IDE mode is selected in BIOS and if so change it to AHCI, especially if you see the STOP 0x0000007B error in Windows 7 or Windows Vista.
Run chkdsk on your hard drive. If the boot volume is corrupted, the chkdsk command might repair the corruption.
Important: You'll likely have to run chkdsk from the Recovery Console.
Note: This will likely be the solution if the second hexadecimal number after the STOP code is 0xC0000032.
Perform an extensive test of your hard drive. If your hard drive has a physical problem, one very likely situation is the STOP 0x0000007B error you're seeing.
Replace the hard drive if the diagnostics you complete suggest that there is a hardware problem with the drive.
Run the fixmbr command to create a new master boot record. A corrupted master boot record might be causing your STOP 0x0000007B error.
Note: This will likely be the solution if the second hexadecimal number after the STOP code is 0xC000000E.
Clear the CMOS. Sometimes the STOP 0x0000007B error is caused by a BIOS memory issue. Clearing the CMOS could solve that problem.
Update your BIOS. In some situations, an outdated BIOS could cause a STOP 0x0000007B error due to incompatibilities with a hard drive controller.
Update the hard drive controller's firmware if possible. Just as with the BIOS in the previous step, an incompatibility could be causing the 0x7B error and a firmware update from the manufacturer may correct the problem.
Repair your Windows installation. If you've just replaced the motherboard in a computer without reinstalling Windows then this will likely fix your problem.
Note: Sometimes a Windows repair will not fix a STOP 0x0000007B error. In those cases, a clean installation of Windows should do the trick.
If you haven't just replaced your motherboard, a Windows reinstall probably will not fix your STOP 0x7B issue.
Perform basic STOP error troubleshooting. If none of the specific steps above help fix the STOP 0x0000007B error you're seeing, take a look at this general STOP error troubleshooting guide. Since most STOP errors are similarly caused, some of the suggestions might help.
Please let me know if you've fixed a blue screen of death with the STOP 0x0000007B STOP code using a method that I don't have above. I'd like to keep this page updated with the most accurate STOP 0x0000007B error troubleshooting information as possible.