• Article for your preferred language does not exist. Below is international version of the article.
Available article translations:

Windows crashes with BSOD. Bad_Pool_Header error message.

  • Parallels Desktop 9 for Mac Standard Edition
  • Parallels Desktop 8 for Mac Standard Edition
  • Parallels Desktop 7 for Mac Standard Edition
  • Parallels Desktop 6 for Mac Standard Edition


Windows Guest OS crashes. A BSOD error message appears:



  1. Boot Windows in the Safe mode. To do that, restart the virtual machine and immediately start pressing F8 repeatedly.

  2. Click on the "Start" button and choose the "Run..." option. Type regedit and press Enter to open the Registry Editor.

  3. Browse to HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Class\{4D36E965-E325-11CE-BFC1-08002BE10318} and find the UpperFilters value.

  4. Right-click on the item, choose the "Delete" option and click "Yes" to delete the item.

  5. Locate the LowerFilters value under the same key in the Registry and delete it too.

  6. Close the Registry Editor.

  7. Restart your computer.


After removing Upperfilters and Lowerfilters and in case of the lost functionality of a particular program, (e.g. CD recording software), you will have to reinstall that program. If the problem recurs, please consult with the software vendor for assistance.

a9c6e0b6a5209e617a7c0dd5eace86cf 1e5db16426987d561060acdf56d947b4 3307fff3682b15f0ba3fbe13d779296d 7f7551051651be47612fed81ddb2b30e 97cd84747b25a2e5a06065a21a747a53 223eaea75536b1878213dd8e38ab608d

Was this article helpful?
Tell us how we may improve it.
Yes No