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Description |
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A device driver may have a bug. 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.
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Sample Screen |
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A problem has been detected and Windows has been shut down to prevent damage to your computer.
SYSTEM_UNWIND_PREVIOUS_USER 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.
Technical Information:
*** STOP: 0x0000003A
Beginning dump of physical memory
Physical memory dump complete.
Contact your system administrator or technical support group for further
assistance. |
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Text may appear differently depending on where the error occurs.
Additional technical information (hex values) specific to a machine are not shown. |
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Key Facts |
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Full Title |
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SYSTEM_UNWIND_PREVIOUS_USER
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Stop Code |
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0x0000003A
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Type |
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Fatal
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Windows |
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2000, XP, Vista, 2008, 7, 8
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Vendor |
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Microsoft Corporation |
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Solutions and Fixes |
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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.

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FaultWire Staff
Posted: 5-Oct-2008 |
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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.
A some of the most popular driver download sites:
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FaultWire Staff
Posted: 5-Oct-2008 |
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Also see our list of common Fatal Error Solutions. |
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Forum Help |
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Check out what others say about this issue and review or add your own comments and solutions!
Go to Forums on topic. |
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Technical Details |
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 An attempt was made to unwind through the system service dispatcher into user mode. |
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Vendor Summary |
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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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Research this Issue |
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Getting search results...
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Notes |
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While we believe this information up to date and accurate, FAQware is not responsible for any inaccuracies. If you find something that is out of date or inaccurate, please let us know at
so we can correct it. |
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