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The issue happens because the update package (Agent-Windows-9.5.3-2754.x86_64.zip) cannot be found from WWWListing and the DSR is downloading the 32-bit package instead of the 64-bit.

To resolve the issue:

  1. Upgrade Deep Security Manager 9.0 SP1 Patch 4 to version 9.5 SP1.
  2. Go to Administrator > Updates > Software > Local and import the update package (Agent-Windows-9.5.3-2754.x86_64.zip).
  3. Navigate to Computer > Action.
  4. Click Upgrade Agent Software to upgrade the DSR.