Support: Generating a small memory dump in Windows

How to generate a small memory dump in Windows

In the case of a system crash, Avast Support may request a small memory dump. A small memory dump is the smallest type of dump file (64 KB) and includes the basic data of the system memory. Follow the steps in this article to generate a small memory dump in Windows on systems which are not completely frozen.

For information about other types of memory dumps that Avast Support may request, refer to the following articles:

  1. Log in to Windows as an Administrator, or as a user with administrator permissions.
  2. Download avkb58.zip.
  3. Open and run the SmallCrashOnCtrlScroll.reg file to apply the necessary changes to your Windows registry.
  4. Restart your PC and wait until the system or program freezes or slows down, then force Windows to crash (and display a BSOD) by holding down the right Ctrl key and pressing the Scroll Lock key twice.
  5. After your PC automatically restarts, locate the latest minidump file (*.dmp) generated by Windows (in C:\Windows\Minidump\ by default) and send it to Avast Support via the Avast FTP server.
  1. Log in to Windows as an Administrator, or as a user with administrator permissions.
    If you have forgotten your password, refer to the instructions on the Microsoft website for your version of Windows to recover or reset it:
  2. Download the avkb58.zip file and click Open in the window that appears.
  3. Download the avkb58.zip file, select Open with in the window that appears, then click OK.
  4. Download the avkb58.zip file, and at the bottom of your browser, click the arrow next to the file name and select Open.
  5. Download the avkb58.zip file and click Open.
  6. Double-click the avkb58 folder, then double-click the SmallCrashOnCtrlScroll.reg file and select Run in the Security Warning dialog.
  7. When prompted, click Yes to allow the application to make changes to your PC.
  8. Click Yes, then OK to apply the necessary changes to your Windows registry.
  9. Restart your PC, log in to Windows with administrator permissions, and wait until the system or program freezes again.
  10. Manually force a Windows crash (BSOD) by holding down the right Ctrl key and pressing the Scroll Lock key twice (right Ctrl + 2x Scroll Lock: You can find the Ctrl key under the Shift key, and the Scroll Lock key in the top-right corner of your keyboard). A blue screen (BSOD) appears. The system generates a memory dump (progress is indicated in percentage) and restarts automatically.
    If your PC does not restart automatically, restart your PC manually by pressing the Reset or Power button.
  11. Log in to Windows with administrator permissions and locate the latest minidump file (in C:\Windows\Minidump by default).
  12. Send the dump file to Avast Support according to the steps outlined in the following article:

For more details about this troubleshooting procedure and the registry entries contained in the SmallCrashOnCtrlScroll.reg file, read the following article on the Microsoft website:

  • All available Avast products for Windows
  • Microsoft Windows 10
  • Microsoft Windows 8.1 / Pro / Enterprise
  • Microsoft Windows 8 / Pro / Enterprise
  • Microsoft Windows 7 Home Basic / Home Premium / Professional / Enterprise / Ultimate
  • Microsoft Windows Vista Home Basic / Home Premium / Business / Enterprise / Ultimate
  • Microsoft Windows XP Home / Professional / Media Center Edition

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