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Windows could not read a file from the disk that is supposed to be there. It may indicate the hard disk has bad sectors, hardware (disk, controller, memory) issues, a virus infection or a bug in a device driver.
This is a fatal Windows error, typically called a Stop message, Bug Check, or more commonly the Blue Screen of Death (BSoD). The system is in a forced reboot state. Any unsaved work is likely lost.
A problem has been detected and Windows has been shut down to prevent damage to your computer.
If this is the first time you've seen this Stop error screen, restart your computer. If this screen appears again, follow these steps:
Check to make sure any new hardware or software is properly installed. If this is a new installation, ask your hardware or software manufacturer for any Windows updates you might need.
If problems continue, disable or remove any newly installed hardware or software. Disable BIOS memory options such as caching or shadowing. If you need to use Safe Mode to remove or disable components, restart your computer, press F8 to select Advanced Startup Options, and then select Safe Mode.
*** STOP: 0x0000007A
Beginning dump of physical memory
Physical memory dump complete.
Contact your system administrator or technical support group for further
Text may appear differently depending on where the error occurs.
Additional technical information (hex values) specific to a machine are not shown.
From the technical details, parameter 2's value may indicate the issue to consider.
Fix Data Corruption
Data and/or file structures on the drive may be corrupt. Run the check disk program or other disk validation and repair utility on the drive. To do this:
Open Explorer or My Computer (Press Windows+E).
In the right pane, right-click on the drive you want to validate and select Properties.
Select the Tools tab.
Under Error-checking, click on "Check Now".
In the next dialog, make sure the option "Automatically fix file system errors" is checked. If you want a more complete validation and repair check the option "Scan for and attempt recovery of bad sectors" (although this takes considerably longer to complete).
You may have a defective memory. This is even more likely if it only occurs when the system is cold or hot, but not all the time. Use a memory tester to confirm if it is defective or if you have spare memory, try replacement.
Windows 7 and Vista include a Memory Test program when booting from the Windows Installation DVD. Step-by-step instructions with screen shots are available at Using System Restore on 7/Vista/2008 as part of System Recovery.
Confirm all the memory is of the same type and speed. Many motherboards only work correctly when the memory is installed with matched sets and matched speeds.
If you added or changed your memory just before this problem occurred, try reverting to the prior memory configuration to confirm it's the source of the problem.
Check that the memory is fully seated in the sockets. Memory sockets often have side latches that need to be upright to indicate the memory is correctly locked in place.
Confirm the memory resides in the correct slots on the motherboard. You'll need to refer to the motherboard manual to confirm this. There is little consistency, even within a single vendor. Some systems require that memory is installed as matched pairs, but not always adjacent to each other!
It's also possible the memory problem is on the video card, as they often contain additional memory. The video card should be tested and/or try a different video card to see if the problem goes away.
FaultWire Staff Posted: 5-Oct-2008
Remove Viruses and Malware
Using an Anti-Virus product with the latest pattern files, scan the system for viruses and malware. Often this is called a deep-scan where it looks at every file in the system.
Several software products that handle the detection and removal of Viruses and Malware include Avanquest's Fix-It Utilities Professional and SystemSuite Professional. Other commonly available Anti-virus products are available from Computer Associates, F-Secure, Kaspersky Labs, McAfee, Sophos, Symantec, Trend Micro and others.
FaultWire Staff Posted: 5-Oct-2008
Check Hard Disk and Cables
If you had changed, added or removed hard drives, or changed or removed drive cabling, likely something is wrong. Recheck that the drives are properly installed and the cabling has not changed. Switching cables to different motherboard connectors or changing the master/slave drive jumpers (on old ATA drives) can cause this problem. In some systems, the cables were not plugged into the drive or motherboard securely and may have worked loose. Reseat all drive connectors.
It's also possible a hard drive is failing. Use a system diagnostic to validate the drive or swap to another hard disk.
Install the latest Windows software updates. Don't forget to check for non-critical updates too!
To manually get updates, open Internet Explorer (you can't use a non-Microsoft browser for updates).
For IE 8 and later: Click on Safety, then Windows Update. Follow the instructions.
For IE 7 and older: Click on Tools, then Windows Update. Follow the instructions.
FaultWire Staff Posted: 5-Oct-2008
Get the Latest Drivers
Check if you are using the latest hardware drivers, especially the chipset and video drivers. Older drivers are a common contributor to BSoD issues.
You can use a product like Driver Genius or Radar Sync to verify you have the latest drivers and help keep all your drivers up-to-date. If you're comfortable with driver installations, you can individually find and install current drivers.
If the BIOS is current, it's possible bad BIOS parameters are causing the problem, especially if the memory or CPU settings are overclocked. The BIOS parameters are stored in CMOS memory. The best way to reset the BIOS parameters is to remove the CMOS battery. To do this:
Unplug the PC, and open the case.
Locate the battery on the motherboard - typically a silver coin cell.
Remove the battery and note if the plus side is up or down, so you can reinstall it later the same way.
Wait at least 1 minute and reinstall the battery.
Attach power and power up. Typically a BIOS warning message will indicate CMOS was corrupted or changed and it may require you to go into the BIOS setup to set the time and date.
Proceed to boot Windows and see if this fixes the issue.
Some BIOSes have options to enable/disable caching and/or shadowing. If the options are available, disable caching and shadowing. Most newer (2005+) systems do not have these options. There are many BIOS makers and customized versions of the BIOS, so you may have to enter BIOS setup and look a bit to find these options. Typically you press a key like Esc, Del, F1, or F2 before Windows starts (almost right after you reboot) to enter BIOS setup. Consult your computer manual for details. The setup key can also be found in our BIOS access list.
While BSoD fatal stop errors are identified by Microsoft Windows, they are often caused by
non-Microsoft applications, drivers and hardware issues.
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