Full Memory Dump on Windows 7

By default, complete memory dump is disabled. Enable this option if your computer has more than 2 GB of physical RAM.
To generate a full memory dump:
  1. Do any of the following:
    • On your desktop:
      1. Click Start, right-click Computer and select Properties.
      2. Click Advanced system settings.
      3. Click Advanced tab.
      4. Under the Writing debugging information section, click Settings.
      5. Select the Complete memory dump.
    • Using the Registry Editor
      1. Open the Registry Editor.
        Important: Always back up the whole registry before making any modifications. Incorrect changes to the registry can cause serious system problems.
      2. Go to HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\CrashControl and set the value of the “CrashDumpEnabled” to “0x1”.
      3. Restart the Windows.

Read : https://success.trendmicro.com/solution/1059775-generating-a-full-memory-dump-on-windows-server-2008-r2-and-windows-7

Read: https://support.kaspersky.com/general/dumps/12402#block2